<?xml version="1.0" encoding="US-ASCII"?>
<!-- EDGAR Online I-Metrix Xcelerate Taxonomy Schema, based on XBRL 2.1  http://www.edgar-online.com/ -->
<!-- Version: 6.20.1 -->
<!-- Round: 3 -->
<!-- Creation date: 2013-01-08T20:04:10Z -->
<!-- Copyright (c) 2005-2011 EDGAR Online, Inc. All Rights Reserved. -->
<schema xmlns="http://www.w3.org/2001/XMLSchema"
  xmlns:xbrli="http://www.xbrl.org/2003/instance"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:us-gaap="http://fasb.org/us-gaap/2012-01-31"
  xmlns:us-types="http://fasb.org/us-types/2012-01-31"
  xmlns:cere="http://www.ceres.net/20121130"
  xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric"
  xmlns:num="http://www.xbrl.org/dtr/type/numeric"
  xmlns:xbrldt="http://xbrl.org/2005/xbrldt"
  xmlns:country="http://xbrl.sec.gov/country/2012-01-31"
  xmlns:dei="http://xbrl.sec.gov/dei/2012-01-31"
  xmlns:invest="http://xbrl.sec.gov/invest/2012-01-31"
  targetNamespace="http://www.ceres.net/20121130"
  elementFormDefault="qualified" attributeFormDefault="unqualified">
  <annotation>
    <appinfo>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DocumentDocumentandEntityInformation" id="DocumentDocumentandEntityInformation">
        <link:definition>101 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/StatementOfFinancialPositionClassified" id="Role_StatementOfFinancialPositionClassified">
        <link:definition>103 - Statement - Condensed Consolidated Balance Sheets</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/StatementOfFinancialPositionClassifiedParenthetical" id="Role_StatementOfFinancialPositionClassifiedParen">
        <link:definition>104 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/StatementOfIncomeAlternative" id="Role_StatementOfIncomeAlternative">
        <link:definition>105 - Statement - Condensed Consolidated Statements of Operations</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/StatementOfOtherComprehensiveIncome" id="Role_StatementOfOtherComprehensiveIncome">
        <link:definition>106 - Statement - Condensed Consolidated Statements of Comprehensive Loss</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/StatementOfCashFlowsIndirect" id="Role_StatementOfCashFlowsIndirect">
        <link:definition>107 - Statement - Condensed Consolidated Statements of Cash Flows</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsNatureOfOperations" id="Role_NotesToFinancialStatementsNatureOfOperations">
        <link:definition>108 - Disclosure - The Company</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsSignificantAccountingPoliciesTextBlock" id="Role_NotesToFinancialStatementsSignificantAccountingPoliciesTextBlock">
        <link:definition>109 - Disclosure - Summary of Significant Accounting Policies</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsInvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock" id="Role_NotesToFinancialStatementsInvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock">
        <link:definition>110 - Disclosure - Marketable Securities</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsInventoryDisclosureTextBlock" id="Role_NotesToFinancialStatementsInventoryDisclosureTextBlock">
        <link:definition>111 - Disclosure - Inventories</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsPropertyPlantAndEquipmentDisclosureTextBlock" id="Role_NotesToFinancialStatementsPropertyPlantAndEquipmentDisclosureTextBlock">
        <link:definition>112 - Disclosure - Property and Equipment</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsAccountsPayableAndAccruedLiabilitiesDisclosureTextBlock" id="Role_NotesToFinancialStatementsAccountsPayableAndAccruedLiabilitiesDisclosureTextBlock">
        <link:definition>113 - Disclosure - Accounts Payable and Accrued Expenses</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsLongTermDebtTextBlock" id="Role_NotesToFinancialStatementsLongTermDebtTextBlock">
        <link:definition>114 - Disclosure - Long-Term Debt</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsConvertibleNoteAndWarrantsDisclosureTextBlock" id="Role_NotesToFinancialStatementsConvertibleNoteAndWarrantsDisclosureTextBlock">
        <link:definition>115 - Disclosure - Convertible Notes and Warrant Modification</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsDisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" id="Role_NotesToFinancialStatementsDisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock">
        <link:definition>116 - Disclosure - Stock-Based Compensation</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsStockholdersEquityNoteDisclosureTextBlock" id="Role_NotesToFinancialStatementsStockholdersEquityNoteDisclosureTextBlock">
        <link:definition>117 - Disclosure - Stockholders' Equity</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsIncomeTaxDisclosureTextBlock" id="Role_NotesToFinancialStatementsIncomeTaxDisclosureTextBlock">
        <link:definition>118 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsCommitmentsAndContingenciesDisclosureTextBlock" id="Role_NotesToFinancialStatementsCommitmentsAndContingenciesDisclosureTextBlock">
        <link:definition>119 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsCollaborativeAndLicenseArrangementDisclosureTextBlock" id="Role_NotesToFinancialStatementsCollaborativeAndLicenseArrangementDisclosureTextBlock">
        <link:definition>120 - Disclosure - Research Collaboration Agreements</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsSubsequentEventsTextBlock" id="Role_NotesToFinancialStatementsSubsequentEventsTextBlock">
        <link:definition>121 - Disclosure - Subsequent Events</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsSignificantAccountingPoliciesTextBlockPolicies" id="Role_NotesToFinancialStatementsSignificantAccountingPoliciesTextBlockPolicies">
        <link:definition>122 - Disclosure - Summary of Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsSignificantAccountingPoliciesTextBlockTables" id="Role_NotesToFinancialStatementsSignificantAccountingPoliciesTextBlockTables">
        <link:definition>123 - Disclosure - Summary of Significant Accounting Policies (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsInvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsInvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlockTables">
        <link:definition>124 - Disclosure - Marketable Securities (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsInventoryDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsInventoryDisclosureTextBlockTables">
        <link:definition>125 - Disclosure - Inventories (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsPropertyPlantAndEquipmentDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsPropertyPlantAndEquipmentDisclosureTextBlockTables">
        <link:definition>126 - Disclosure - Property and Equipment (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsAccountsPayableAndAccruedLiabilitiesDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsAccountsPayableAndAccruedLiabilitiesDisclosureTextBlockTables">
        <link:definition>127 - Disclosure - Accounts Payable and Accrued Expenses (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsLongTermDebtTextBlockTables" id="Role_NotesToFinancialStatementsLongTermDebtTextBlockTables">
        <link:definition>128 - Disclosure - Long-Term Debt (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsDisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlockTables" id="Role_NotesToFinancialStatementsDisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlockTables">
        <link:definition>129 - Disclosure - Stock-Based Compensation (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsCommitmentsAndContingenciesDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsCommitmentsAndContingenciesDisclosureTextBlockTables">
        <link:definition>130 - Disclosure - Commitments and Contingencies (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/NotesToFinancialStatementsCollaborativeAndLicenseArrangementDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsCollaborativeAndLicenseArrangementDisclosureTextBlockTables">
        <link:definition>131 - Disclosure - Research Collaboration Agreements (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureTheCompanyAdditionalInformation" id="DisclosureTheCompanyAdditionalInformation">
        <link:definition>132 - Disclosure - The Company - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureFinancialAssetsMeasuredAtFairValueOnRecurringBasis" id="DisclosureFinancialAssetsMeasuredAtFairValueOnRecurringBasis">
        <link:definition>133 - Disclosure - Financial Assets Measured at Fair Value on Recurring Basis (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureCustomersRepresentingGreaterThanTenPercentOfAccountsReceivable" id="DisclosureCustomersRepresentingGreaterThanTenPercentOfAccountsReceivable">
        <link:definition>134 - Disclosure - Customers Representing Greater than Ten Percent of Accounts Receivable (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureCustomersRepresentingGreaterThanTenPercentOfRevenues" id="DisclosureCustomersRepresentingGreaterThanTenPercentOfRevenues">
        <link:definition>135 - Disclosure - Customers Representing Greater than Ten Percent of Revenues (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureDepreciationPeriodsForPropertyAndEquipment" id="DisclosureDepreciationPeriodsForPropertyAndEquipment">
        <link:definition>136 - Disclosure - Depreciation Periods for Property and Equipment (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformation" id="DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformation">
        <link:definition>137 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureComputationOfBasicAndDilutedNetLossPerCommonShare" id="DisclosureComputationOfBasicAndDilutedNetLossPerCommonShare">
        <link:definition>138 - Disclosure - Computation of Basic and Diluted Net Loss Per Common Share (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosurePotentiallyDilutiveCommonShareEquivalentsExcludedFromCalculationOfDilutedNetLossPerCommonShare" id="DisclosurePotentiallyDilutiveCommonShareEquivalentsExcludedFromCalculationOfDilutedNetLossPerCommonShare">
        <link:definition>139 - Disclosure - Potentially Dilutive, Common Share Equivalents Excluded from Calculation of Diluted Net Loss Per Common Share (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureAvailableForSaleSecurities" id="DisclosureAvailableForSaleSecurities">
        <link:definition>140 - Disclosure - Available for Sale Securities (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureSummaryOfAmortizedCostAndFairValueOfMarketableSecuritiesClassifiedByStatedMaturity" id="DisclosureSummaryOfAmortizedCostAndFairValueOfMarketableSecuritiesClassifiedByStatedMaturity">
        <link:definition>141 - Disclosure - Summary of Amortized Cost and Fair Value of Marketable Securities, Classified by Stated Maturity (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureInventories" id="DisclosureInventories">
        <link:definition>142 - Disclosure - Inventories (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosurePropertyAndEquipmentSummary" id="DisclosurePropertyAndEquipmentSummary">
        <link:definition>143 - Disclosure - Property and Equipment Summary (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureAccountsPayableAndAccruedExpenses" id="DisclosureAccountsPayableAndAccruedExpenses">
        <link:definition>144 - Disclosure - Accounts Payable and Accrued Expenses (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureLongTermDebtSummary" id="DisclosureLongTermDebtSummary">
        <link:definition>145 - Disclosure - Long-Term Debt Summary (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureLongTermDebtAdditionalInformation" id="DisclosureLongTermDebtAdditionalInformation">
        <link:definition>146 - Disclosure - Long-Term Debt - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureAggregatedMaturitiesOfDebt" id="DisclosureAggregatedMaturitiesOfDebt">
        <link:definition>147 - Disclosure - Aggregated Maturities of Debt (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureConvertibleNotesAndWarrantModificationAdditionalInformation" id="DisclosureConvertibleNotesAndWarrantModificationAdditionalInformation">
        <link:definition>148 - Disclosure - Convertible Notes and Warrant Modification - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformation" id="DisclosureStockBasedCompensationAdditionalInformation">
        <link:definition>149 - Disclosure - Stock-Based Compensation - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureFairValueOfEmployeeStockOptionsEstimatedUsingWeightedAverageAssumptions" id="DisclosureFairValueOfEmployeeStockOptionsEstimatedUsingWeightedAverageAssumptions">
        <link:definition>150 - Disclosure - Fair Value of Employee Stock Options Estimated Using Weighted Average Assumptions (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureStockBasedCompensationCostsIncludedInOperatingExpensesAndTotalIntrinsicValueOfOptionsExercised" id="DisclosureStockBasedCompensationCostsIncludedInOperatingExpensesAndTotalIntrinsicValueOfOptionsExercised">
        <link:definition>151 - Disclosure - Stock-Based Compensation Costs Included in Operating Expenses and Total Intrinsic Value of Options Exercised (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureSummaryOfStockOptionTransactionsUnderOptionPlans" id="DisclosureSummaryOfStockOptionTransactionsUnderOptionPlans">
        <link:definition>152 - Disclosure - Summary of Stock Option Transactions under Option Plans (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureSummaryOfInformationAboutStockOptionsOutstandingAndExercisable" id="DisclosureSummaryOfInformationAboutStockOptionsOutstandingAndExercisable">
        <link:definition>153 - Disclosure - Summary of Information about Stock Options Outstanding and Exercisable (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureSummaryOfRestrictedStockTransactionsUnderOptionPlans" id="DisclosureSummaryOfRestrictedStockTransactionsUnderOptionPlans">
        <link:definition>154 - Disclosure - Summary of Restricted Stock Transactions under Option Plans (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureStockholdersEquityAdditionalInformation" id="DisclosureStockholdersEquityAdditionalInformation">
        <link:definition>155 - Disclosure - Stockholders' Equity - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureCommitmentsAndContingenciesAdditionalInformation" id="DisclosureCommitmentsAndContingenciesAdditionalInformation">
        <link:definition>156 - Disclosure - Commitments and Contingencies - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureFutureMinimumPaymentsUnderNoncancelableOperatingLeases" id="DisclosureFutureMinimumPaymentsUnderNoncancelableOperatingLeases">
        <link:definition>157 - Disclosure - Future Minimum Payments under Noncancelable Operating Leases (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureResearchCollaborationAgreementsAdditionalInformation" id="DisclosureResearchCollaborationAgreementsAdditionalInformation">
        <link:definition>158 - Disclosure - Research Collaboration Agreements - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.ceres.net/taxonomy/role/DisclosureFutureMinimumPaymentsUnderCompanysResearchCollaboration" id="DisclosureFutureMinimumPaymentsUnderCompanysResearchCollaboration">
        <link:definition>159 - Disclosure - Future Minimum Payments under Company's Research Collaboration (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:linkbaseRef xlink:type="simple" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:href="cere-20121130_cal.xml" xlink:title="Calculation Links, all"/>
      <link:linkbaseRef xlink:type="simple" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:href="cere-20121130_def.xml" xlink:title="Definition Links, all"/>
      <link:linkbaseRef xlink:type="simple" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:href="cere-20121130_lab.xml" xlink:title="Label Links, all"/>
      <link:linkbaseRef xlink:type="simple" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:href="cere-20121130_pre.xml" xlink:title="Presentation Links, all"/>
    </appinfo>
  </annotation>
  <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <import namespace="http://fasb.org/us-types/2012-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2012/elts/us-types-2012-01-31.xsd"/>
  <import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd"/>
  <import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd"/>
  <import namespace="http://fasb.org/us-gaap/2012-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd"/>
  <import namespace="http://xbrl.sec.gov/country/2012-01-31" schemaLocation="http://xbrl.sec.gov/country/2012/country-2012-01-31.xsd"/>
  <import namespace="http://xbrl.sec.gov/dei/2012-01-31" schemaLocation="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd"/>
  <import namespace="http://xbrl.sec.gov/invest/2012-01-31" schemaLocation="http://xbrl.sec.gov/invest/2012/invest-2012-01-31.xsd"/>
  <element name="AccountingPoliciesLineItems" id="cere_AccountingPoliciesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="AccountingPoliciesTable" id="cere_AccountingPoliciesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="AccountsPayableAndAccruedLiabilitiesLineItems" id="cere_AccountsPayableAndAccruedLiabilitiesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="AccountsPayableAndAccruedLiabilitiesTable" id="cere_AccountsPayableAndAccruedLiabilitiesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="AccruedGrowerCommitmentsCurrent" id="cere_AccruedGrowerCommitmentsCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="AccruedResearchAndDevelopmentExpenseCurrent" id="cere_AccruedResearchAndDevelopmentExpenseCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="AdditionalCommonSharesPurchasedUponExerciseOfUnderwritersRights" id="cere_AdditionalCommonSharesPurchasedUponExerciseOfUnderwritersRights" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="AfterAmendmentMember" id="cere_AfterAmendmentMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="AgreementsExpirationDate" id="cere_AgreementsExpirationDate" type="xbrli:dateItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="AmendedLoanAgreementMember" id="cere_AmendedLoanAgreementMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="BasisOfPresentationAndPrinciplesOfConsolidationPolicyTextBlock" id="cere_BasisOfPresentationAndPrinciplesOfConsolidationPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="BeforeAmendmentMember" id="cere_BeforeAmendmentMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="BorrowingAndLoanAgreementsWarrantsMember" id="cere_BorrowingAndLoanAgreementsWarrantsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="CampbellMember" id="cere_CampbellMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="CeresSementesDoBrasilLtdaMember" id="cere_CeresSementesDoBrasilLtdaMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ClassOfWarrantOrRightExercisePeriod" id="cere_ClassOfWarrantOrRightExercisePeriod" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ClassOfWarrantOrRightExpiryDateOfWarrantsOrRightsExercisable" id="cere_ClassOfWarrantOrRightExpiryDateOfWarrantsOrRightsExercisable" type="xbrli:dateItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ClassOfWarrantOrRightNumberOfSharesVestingInEqualInstallments" id="cere_ClassOfWarrantOrRightNumberOfSharesVestingInEqualInstallments" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ClassOfWarrantOrRightNumberOfSharesVestingInEqualInstallmentsDate" id="cere_ClassOfWarrantOrRightNumberOfSharesVestingInEqualInstallmentsDate" type="xbrli:dateItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ClassOfWarrantOrRightOutstandingVested" id="cere_ClassOfWarrantOrRightOutstandingVested" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="CollaborationAgreementJulyThirtyOneTwentyFourteenMember" id="cere_CollaborationAgreementJulyThirtyOneTwentyFourteenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="CollaborationAgreementJulyThirtyOneTwentyThirteenMember" id="cere_CollaborationAgreementJulyThirtyOneTwentyThirteenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="CollaborationAgreementPaymentDate" id="cere_CollaborationAgreementPaymentDate" type="xbrli:dateItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="CollaborationAgreementsLineItems" id="cere_CollaborationAgreementsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="CollaborationAgreementsTable" id="cere_CollaborationAgreementsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="CollaborativeAndLicenseArrangementDisclosureTextBlock" id="cere_CollaborativeAndLicenseArrangementDisclosureTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="CommonStockWarrantsMember" id="cere_CommonStockWarrantsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ContractualObligationDueInFifthYearAndThereafter" id="cere_ContractualObligationDueInFifthYearAndThereafter" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ContractualObligationDueInRemainderOfYear" id="cere_ContractualObligationDueInRemainderOfYear" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ConversionOfPreferredStockWarrantsIntoWarrantsToPurchaseCommonStock" id="cere_ConversionOfPreferredStockWarrantsIntoWarrantsToPurchaseCommonStock" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ConvertibleNoteAndWarrantsDisclosureTextBlock" id="cere_ConvertibleNoteAndWarrantsDisclosureTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ConvertiblePreferredStockPolicyTextBlock" id="cere_ConvertiblePreferredStockPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ConvertiblePreferredStockWarrantsMember" id="cere_ConvertiblePreferredStockWarrantsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="CustomerAMember" id="cere_CustomerAMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="CustomerBMember" id="cere_CustomerBMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="CustomerCMember" id="cere_CustomerCMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="CustomerDMember" id="cere_CustomerDMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="CustomerEMember" id="cere_CustomerEMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="CustomerFMember" id="cere_CustomerFMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DebtDisclosureLineItems" id="cere_DebtDisclosureLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DebtDisclosureTable" id="cere_DebtDisclosureTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="DebtInstrumentConvertibleConversionPricePercentageOfDiscountToInitialPublicOfferingPrice" id="cere_DebtInstrumentConvertibleConversionPricePercentageOfDiscountToInitialPublicOfferingPrice" type="num:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DebtInstrumentConvertibleConversionPricePerShare" id="cere_DebtInstrumentConvertibleConversionPricePerShare" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DebtInstrumentFaceAmountAvailableUponSatisfactionOfConditions" id="cere_DebtInstrumentFaceAmountAvailableUponSatisfactionOfConditions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DebtInstrumentFaceAmountImmediatelyAvailable" id="cere_DebtInstrumentFaceAmountImmediatelyAvailable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DebtInstrumentMaturityPeriod" id="cere_DebtInstrumentMaturityPeriod" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DevelopmentAndLicenseAgreementMember" id="cere_DevelopmentAndLicenseAgreementMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureAccountsPayableAndAccruedExpensesAbstract" id="cere_DisclosureAccountsPayableAndAccruedExpensesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureAggregatedMaturitiesOfDebtAbstract" id="cere_DisclosureAggregatedMaturitiesOfDebtAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureAvailableForSaleSecuritiesAbstract" id="cere_DisclosureAvailableForSaleSecuritiesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureCommitmentsAndContingenciesAdditionalInformationAbstract" id="cere_DisclosureCommitmentsAndContingenciesAdditionalInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureComputationOfBasicAndDilutedNetLossPerCommonShareAbstract" id="cere_DisclosureComputationOfBasicAndDilutedNetLossPerCommonShareAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureConvertibleNotesAndWarrantModificationAdditionalInformationAbstract" id="cere_DisclosureConvertibleNotesAndWarrantModificationAdditionalInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureCustomersRepresentingGreaterThanTenPercentOfAccountsReceivableAbstract" id="cere_DisclosureCustomersRepresentingGreaterThanTenPercentOfAccountsReceivableAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureCustomersRepresentingGreaterThanTenPercentOfRevenuesAbstract" id="cere_DisclosureCustomersRepresentingGreaterThanTenPercentOfRevenuesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureDepreciationPeriodsForPropertyAndEquipmentAbstract" id="cere_DisclosureDepreciationPeriodsForPropertyAndEquipmentAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureFairValueOfEmployeeStockOptionsEstimatedUsingWeightedAverageAssumptionsAbstract" id="cere_DisclosureFairValueOfEmployeeStockOptionsEstimatedUsingWeightedAverageAssumptionsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureFinancialAssetsMeasuredAtFairValueOnRecurringBasisAbstract" id="cere_DisclosureFinancialAssetsMeasuredAtFairValueOnRecurringBasisAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureFutureMinimumPaymentsUnderCompanysResearchCollaborationAbstract" id="cere_DisclosureFutureMinimumPaymentsUnderCompanysResearchCollaborationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureFutureMinimumPaymentsUnderNoncancelableOperatingLeasesAbstract" id="cere_DisclosureFutureMinimumPaymentsUnderNoncancelableOperatingLeasesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureInventoriesAbstract" id="cere_DisclosureInventoriesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureLongTermDebtAdditionalInformationAbstract" id="cere_DisclosureLongTermDebtAdditionalInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureLongTermDebtSummaryAbstract" id="cere_DisclosureLongTermDebtSummaryAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosurePotentiallyDilutiveCommonShareEquivalentsExcludedFromCalculationOfDilutedNetLossPerCommonShareAbstract" id="cere_DisclosurePotentiallyDilutiveCommonShareEquivalentsExcludedFromCalculationOfDilutedNetLossPerCommonShareAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosurePropertyAndEquipmentSummaryAbstract" id="cere_DisclosurePropertyAndEquipmentSummaryAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureResearchCollaborationAgreementsAdditionalInformationAbstract" id="cere_DisclosureResearchCollaborationAgreementsAdditionalInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureStockBasedCompensationAdditionalInformationAbstract" id="cere_DisclosureStockBasedCompensationAdditionalInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureStockBasedCompensationCostsIncludedInOperatingExpensesAndTotalIntrinsicValueOfOptionsExercisedAbstract" id="cere_DisclosureStockBasedCompensationCostsIncludedInOperatingExpensesAndTotalIntrinsicValueOfOptionsExercisedAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureStockholdersEquityAdditionalInformationAbstract" id="cere_DisclosureStockholdersEquityAdditionalInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureSummaryOfAmortizedCostAndFairValueOfMarketableSecuritiesClassifiedByStatedMaturityAbstract" id="cere_DisclosureSummaryOfAmortizedCostAndFairValueOfMarketableSecuritiesClassifiedByStatedMaturityAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureSummaryOfInformationAboutStockOptionsOutstandingAndExercisableAbstract" id="cere_DisclosureSummaryOfInformationAboutStockOptionsOutstandingAndExercisableAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureSummaryOfRestrictedStockTransactionsUnderOptionPlansAbstract" id="cere_DisclosureSummaryOfRestrictedStockTransactionsUnderOptionPlansAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationAbstract" id="cere_DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureSummaryOfStockOptionTransactionsUnderOptionPlansAbstract" id="cere_DisclosureSummaryOfStockOptionTransactionsUnderOptionPlansAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureTheCompanyAdditionalInformationAbstract" id="cere_DisclosureTheCompanyAdditionalInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DocumentDocumentandEntityInformationAbstract" id="cere_DocumentDocumentandEntityInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="EntityWideAccountsReceivableMajorCustomerPercentage" id="cere_EntityWideAccountsReceivableMajorCustomerPercentage" type="num:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="EquipmentLoanMember" id="cere_EquipmentLoanMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="EquityIncentivePlanTwentyElevenMember" id="cere_EquityIncentivePlanTwentyElevenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ExercisePriceEightMember" id="cere_ExercisePriceEightMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ExercisePriceElevenMember" id="cere_ExercisePriceElevenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ExercisePriceFiveMember" id="cere_ExercisePriceFiveMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ExercisePriceFourMember" id="cere_ExercisePriceFourMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ExercisePriceNineMember" id="cere_ExercisePriceNineMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ExercisePriceOneMember" id="cere_ExercisePriceOneMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ExercisePriceSevenMember" id="cere_ExercisePriceSevenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ExercisePriceSixMember" id="cere_ExercisePriceSixMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ExercisePriceTenMember" id="cere_ExercisePriceTenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ExercisePriceThreeMember" id="cere_ExercisePriceThreeMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ExercisePriceTwelveMember" id="cere_ExercisePriceTwelveMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ExercisePriceTwoMember" id="cere_ExercisePriceTwoMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ExpectedTerminationFee" id="cere_ExpectedTerminationFee" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="FairValueOfWarrantsIssued" id="cere_FairValueOfWarrantsIssued" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="FinancialInstrumentsMeasuredAtFairValueOnRecurringBasisLineItems" id="cere_FinancialInstrumentsMeasuredAtFairValueOnRecurringBasisLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="FinancialInstrumentsMeasuredAtFairValueOnRecurringBasisTable" id="cere_FinancialInstrumentsMeasuredAtFairValueOnRecurringBasisTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="FinancialInstrumentsPolicyTextBlock" id="cere_FinancialInstrumentsPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="InterimFinancialInformationPolicyTextBlock" id="cere_InterimFinancialInformationPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="InventoryDisclosureLineItems" id="cere_InventoryDisclosureLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="InventoryDisclosureTable" id="cere_InventoryDisclosureTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="IpRightsAgreementMember" id="cere_IpRightsAgreementMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="LeaseholdImprovementsReimbursedByLessorsAsLeaseIncentives" id="cere_LeaseholdImprovementsReimbursedByLessorsAsLeaseIncentives" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="LicenseAgreementEffectiveDate" id="cere_LicenseAgreementEffectiveDate" type="xbrli:dateItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="LicensingAgreementExpirationDate" id="cere_LicensingAgreementExpirationDate" type="xbrli:dateItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="MarketableSecuritiesAmortizedCostAbstract" id="cere_MarketableSecuritiesAmortizedCostAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="MarketableSecuritiesDebtMaturitiesAmortizedCost" id="cere_MarketableSecuritiesDebtMaturitiesAmortizedCost" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="MarketableSecuritiesDebtMaturitiesFairValue" id="cere_MarketableSecuritiesDebtMaturitiesFairValue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="MarketableSecuritiesDebtMaturitiesOneThroughTwoYearsAmortizedCost" id="cere_MarketableSecuritiesDebtMaturitiesOneThroughTwoYearsAmortizedCost" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="MarketableSecuritiesDebtMaturitiesOneThroughTwoYearsFairValue" id="cere_MarketableSecuritiesDebtMaturitiesOneThroughTwoYearsFairValue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="MarketableSecuritiesDebtMaturitiesWithinOneYearAmortizedCost" id="cere_MarketableSecuritiesDebtMaturitiesWithinOneYearAmortizedCost" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="MarketableSecuritiesDebtMaturitiesWithinOneYearFairValue" id="cere_MarketableSecuritiesDebtMaturitiesWithinOneYearFairValue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="MarketableSecuritiesFairValueAbstract" id="cere_MarketableSecuritiesFairValueAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ModificationChargeForOptionsExchangedUnderOptionExchangeProgram" id="cere_ModificationChargeForOptionsExchangedUnderOptionExchangeProgram" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ModifiedSeriesFConvertiblePreferredStockWarrantsMember" id="cere_ModifiedSeriesFConvertiblePreferredStockWarrantsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NobleAgreementWarrantsMember" id="cere_NobleAgreementWarrantsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NobleResearchProgramAgreementMember" id="cere_NobleResearchProgramAgreementMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NoncashInterestExpenseIncomeNet" id="cere_NoncashInterestExpenseIncomeNet" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NonmodifiedSeriesFConvertiblePreferredStockWarrantsMember" id="cere_NonmodifiedSeriesFConvertiblePreferredStockWarrantsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NumberOfStockIncentivePlans" id="cere_NumberOfStockIncentivePlans" type="xbrli:positiveIntegerItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NumberOfTranchesOfDebtIssued" id="cere_NumberOfTranchesOfDebtIssued" type="xbrli:integerItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OfficeLaboratoryFarmAndWarehouseEquipmentAndFurnitureMember" id="cere_OfficeLaboratoryFarmAndWarehouseEquipmentAndFurnitureMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OperatingLeasesExpirationYear" id="cere_OperatingLeasesExpirationYear" type="xbrli:gYearItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OtherCurrentLiabilities" id="cere_OtherCurrentLiabilities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PercentageOfOwnershipInSubsidiaries" id="cere_PercentageOfOwnershipInSubsidiaries" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PeriodAxis" id="cere_PeriodAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:dimensionItem"/>
  <element name="PeriodDomain" id="cere_PeriodDomain" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PeriodFourMember" id="cere_PeriodFourMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PeriodOneMember" id="cere_PeriodOneMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PeriodThreeMember" id="cere_PeriodThreeMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PeriodTwoMember" id="cere_PeriodTwoMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ProceedsFromInsuranceRecoveries" id="cere_ProceedsFromInsuranceRecoveries" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ProceedsFromIssuanceOfDebtAndPreferredStockWarrants" id="cere_ProceedsFromIssuanceOfDebtAndPreferredStockWarrants" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PropertyAndEquipmentEstimatedUsefulLivesTableTextBlock" id="cere_PropertyAndEquipmentEstimatedUsefulLivesTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ResearchAndDevelopmentCollaborativeAgreements" id="cere_ResearchAndDevelopmentCollaborativeAgreements" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ResearchCollaborationAgreementsMember" id="cere_ResearchCollaborationAgreementsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfAccountsReceivableByMajorCustomerTableTextBlock" id="cere_ScheduleOfAccountsReceivableByMajorCustomerTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfActivityRelatedToRestrictedSharesAndRestrictedShareLineItems" id="cere_ScheduleOfActivityRelatedToRestrictedSharesAndRestrictedShareLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfActivityRelatedToRestrictedSharesAndRestrictedShareTable" id="cere_ScheduleOfActivityRelatedToRestrictedSharesAndRestrictedShareTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="ScheduleOfCompensationCostForShareBasedPaymentArrangementsAndIntrinsicValueTableTextBlock" id="cere_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAndIntrinsicValueTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfEarningsPerShareBasicAndDilutedLineItems" id="cere_ScheduleOfEarningsPerShareBasicAndDilutedLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfEarningsPerShareBasicAndDilutedTable" id="cere_ScheduleOfEarningsPerShareBasicAndDilutedTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="ScheduleOfMarketableSecuritiesLineItems" id="cere_ScheduleOfMarketableSecuritiesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfMarketableSecuritiesTable" id="cere_ScheduleOfMarketableSecuritiesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="SeriesFConvertiblePreferredStockWarrantsMember" id="cere_SeriesFConvertiblePreferredStockWarrantsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SeriesGConvertiblePreferredStockWarrantsMember" id="cere_SeriesGConvertiblePreferredStockWarrantsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresInPeriodWeightedAverageExercisePrice" id="cere_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresInPeriodWeightedAverageExercisePrice" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageExercisePrice" id="cere_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageExercisePrice" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageExercisePrice" id="cere_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageExercisePrice" type="num:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsWeightedAverageExercisePriceAbstract" id="cere_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsWeightedAverageExercisePriceAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsMaximumExpirationTerm" id="cere_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsMaximumExpirationTerm" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsModifiedInPeriod" id="cere_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsModifiedInPeriod" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRange" id="cere_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRange" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SponsoredResearchAndIntellectualPropertyRightsAgreementMember" id="cere_SponsoredResearchAndIntellectualPropertyRightsAgreementMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="StockholdersEquityNoteDisclosureLineItems" id="cere_StockholdersEquityNoteDisclosureLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="StockholdersEquityNoteDisclosureTable" id="cere_StockholdersEquityNoteDisclosureTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="StockIssuedDuringPeriodSharesInitialPublicOffering" id="cere_StockIssuedDuringPeriodSharesInitialPublicOffering" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="TexasAAndMUniversitySystemAgreementWarrantsMember" id="cere_TexasAAndMUniversitySystemAgreementWarrantsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WarrantLiabilityPolicyTextBlock" id="cere_WarrantLiabilityPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract" id="cere_WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
</schema>
