Exhibit 4.5

DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12

OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED

As of December 31, 2021, BioPlus Acquisition Corp. (“we,” “our,” “us” or the “Company”) had the following three classes of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”): (i) its units, consisting of one Class A ordinary share (as defined below) and one-half of one redeemable warrant (as defined below), with each whole warrant entitling the holder thereof to purchase one Class A ordinary share (the “units”), (ii) its Class A ordinary shares, $0.0001 par value per share (“Class A ordinary shares”), and (iii) its public warrants, with each whole warrant exercisable for one Class A ordinary share for $11.50 per share (the “warrants”).

Pursuant to our amended and restated memorandum and articles of association, our authorized share capital consists of 555,000,000 shares, including 500,000,000 Class A ordinary shares, $0.0001 par value, 50,000,000 Class B ordinary shares, $0.0001 par value, and 5,000,000 undesignated preference shares, $0.0001 par value. The following description summarizes the material terms of our capital stock and does not purport to be complete. It is subject to, and qualified in its entirety by reference to, our amended and restated memorandum and articles of association, and our warrant agreement, each of which is incorporated by reference as an exhibit to our Annual Report on Form 10-K for the year ended December 31, 2021 (the “Report”) of which this Exhibit 4.5 is a part. Defined terms used herein but not otherwise defined shall have the meaning ascribed to such terms in the Report.

Units

Each unit has an offering price of $10.00 and consists of one Class A ordinary share and one-half of one warrant. Each whole warrant entitles the holder thereof to purchase one Class A ordinary share at a price of $11.50 per share, subject to adjustment as described in this Report. Warrants must be exercised for one whole Class A ordinary share.

Ordinary shares

Except as described below, Class A ordinary shareholders and Class B ordinary shareholders of record are entitled to one vote for each share held on all matters to be voted on by shareholders. Holders of the Class A ordinary shares and holders of the Class B ordinary shares will vote together as a single class on all matters submitted to a vote of our shareholders, except as required by law.

Unless specified in the Companies Act, our amended and restated memorandum and articles of association or applicable stock exchange rules, an ordinary resolution is required to approve any such matter voted on by our shareholders. Approval of certain actions will require a special resolution under Cayman Islands law and pursuant to our amended and restated memorandum and articles of association; such actions include amending our amended and restated memorandum and articles of association and approving a statutory merger or consolidation with another company.

Our board of directors will be divided into three classes, each of which will generally serve for a term of three years with only one class of directors being elected in each year. Prior to our initial business combination, only the holders of our founder shares will be entitled to vote on the appointment and removal of our directors. There is no cumulative voting with respect to the election of directors, with the result that the holders of more than 50% of the shares voted for the election of directors can elect all of the directors. Our shareholders are entitled to receive ratable dividends when, as and if declared by the board of directors out of funds legally available therefor.

Prior to our initial business combination, only the holders of our founder shares will be entitled to vote on the appointment of our directors and to vote to continue the company in a jurisdiction out the Cayman Islands. Holders of our Class A ordinary shares will not be entitled to vote on the appointment of directors during such time. In addition, prior to the completion of an initial business combination, holders of a majority of our founder shares may remove a member of the board of directors for any reason.

Because our amended and restated memorandum and articles of association authorizes the issuance of up to 500,000,000 Class A ordinary shares, if we were to enter into an initial business combination, we may (depending on the terms of such an initial business combination) be required to increase the number of Class A ordinary shares which we are authorized to issue at the same time as our shareholders vote on the initial business combination to the extent we seek shareholder approval in connection with our initial business combination.

In accordance with Nasdaq corporate governance requirements, we are not required to hold an annual general meeting until one year after our fiscal year end following our listing on Nasdaq. There is no requirement under the Companies Act for us to hold annual or extraordinary general meetings to appoint directors. We may not hold an annual general meeting prior to the completion of our initial business combination.

We will provide our Class A public shareholders with the opportunity to redeem all or a portion of their public shares upon the completion of our initial business combination at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the trust account as of two business days prior to the completion of our initial business combination including interest earned on the funds held in the trust account and not previously released to us to pay our taxes, divided by the number of then outstanding public shares, subject to the limitations described herein. The per-share amount we will distribute to investors who properly redeem their shares will not be reduced by the deferred underwriting commissions we will pay to the underwriters. Our sponsor, officers and directors have entered into a letter agreement with us, pursuant to which they have agreed to waive their redemption rights with respect to any founder shares and placement shares and any public shares held by them in connection with the completion of our initial business combination. Unlike many blank check companies that hold shareholder votes and conduct proxy solicitations in conjunction with their initial business combinations and provide for related redemptions of public shares for cash upon completion of such initial business combinations even when a vote is not required by law, if a shareholder vote is not required by law and we do not decide to hold a shareholder vote for business or other legal reasons, we will, pursuant to our amended and restated memorandum and articles of association, conduct the redemptions pursuant to the tender offer rules of the SEC, and file tender offer documents with the SEC prior to completing our initial business combination. Our amended and restated memorandum and articles of association will require these tender offer documents to contain substantially the same financial and other information about the initial business combination and the redemption rights as is required under the SEC’s proxy rules. If, however, a shareholder approval of the transaction is required by law, or we decide to obtain shareholder approval for business or other legal reasons, we will, like many blank check companies, offer to redeem shares in conjunction with a proxy solicitation pursuant to the proxy rules and not pursuant to the tender offer rules. If we seek shareholder approval, we will complete our initial business combination only if it is approved by an ordinary resolution or such higher percentage as may be required by Cayman Islands law, and pursuant to our amended and restated memorandum and articles of association. A quorum for such meeting will consist of the holders present in person or by proxy of outstanding shares of the company representing one third of the voting power of all issued and outstanding shares of the company entitled to vote at such meeting.

The participation of our sponsor, officers, directors, advisors or their affiliates in privately-negotiated transactions (as described in this prospectus), if any, could result in the approval of our initial business combination even if a majority of our public shareholders vote, or indicate their intention to vote, against such business combination. For purposes of seeking approval of the majority of our outstanding ordinary shares voted, non-votes will have no effect on the approval of our initial business combination once a quorum is obtained.

We intend to give approximately 30 days (but not less than 10 days nor more than 60 days) prior written notice of any such meeting, if required, at which a vote shall be taken to approve our initial business combination. These quorum and voting thresholds, and the voting agreements of our initial shareholders, may make it more likely that we will complete our initial business combination. If we seek shareholder approval of our initial business combination and we do not conduct redemptions in connection with our initial business combination pursuant to the tender offer rules, our amended and restated memorandum and articles of association will provide that a public shareholder, together with any affiliate of such shareholder or any other person with whom such shareholder is acting in concert or as a “group” (as defined under Section 13 of the Exchange Act), will be restricted from redeeming its shares with respect to more than an aggregate of 15% of the ordinary shares sold in this offering, which we refer to as the Excess Shares. However, we would not be restricting our shareholders’ ability to vote all of their shares (including Excess Shares) for or against our initial business combination. Our shareholders’ inability to redeem the Excess Shares will reduce their influence over our ability to complete our initial business combination,

and such shareholders could suffer a material loss in their investment if they sell such Excess Shares on the open market. Additionally, such shareholders will not receive redemption distributions with respect to the Excess Shares if we complete the initial business combination. And, as a result, such shareholders will continue to hold that number of shares exceeding 15% and, in order to dispose such shares would be required to sell their shares in open market transactions, potentially at a loss.

In the event of a liquidation, dissolution or winding up of the company after an initial business combination, our shareholders are entitled to share ratably in all assets remaining available for distribution to them after payment of liabilities and after provision is made for each class of shares, if any, having preference over the ordinary shares. Our shareholders have no preemptive or other subscription rights. There are no sinking fund provisions applicable to the ordinary shares, except that we will provide our shareholders with the opportunity to redeem their public shares for cash equal to their pro rata share of the aggregate amount then on deposit in the trust account, upon the completion of our initial business combination, subject to the limitations described herein.

Redeemable Warrants

Each whole warrant entitles the registered holder to purchase one of our Class A ordinary shares at a price of $11.50, subject to adjustment as discussed below, at any time commencing on the later of 12 months from the closing of this offering or 30 days after the completion of our initial business combination. Pursuant to the warrant agreement, a warrantholder may exercise its warrants only for a whole number of Class A ordinary shares. This means that only a whole warrant may be exercised at any given time by a warrantholder. No fractional warrants will be issued upon separation of the units and only whole warrants will trade. Accordingly, unless you purchase at least two units, you will not be able to receive or trade a whole warrant.

The warrants will expire five years after the completion of our initial business combination, at 5:00 p.m., New York City time, or earlier upon redemption or liquidation.

We will not be obligated to deliver any Class A ordinary shares pursuant to the exercise of a warrant and will have no obligation to settle such warrant exercise unless a registration statement under the Securities Act with respect to the Class A ordinary shares underlying the warrants is then effective and a prospectus relating thereto is current, subject to our satisfying our obligations described below with respect to registration, or a valid exemption from registration is available. No warrant will be exercisable and we will not be obligated to issue Class A ordinary shares upon exercise of a warrant unless Class A ordinary shares issuable upon such warrant exercise has been registered, qualified or deemed to be exempt under the securities laws of the state of residence of the registered holder of the warrants. In the event that the conditions in the two immediately preceding sentences are not satisfied with respect to a warrant, the holder of such warrant will not be entitled to exercise such warrant and such warrant may have no value and expire worthless. In no event will we be required to net cash settle any warrant. In the event that a registration statement is not effective for the exercised warrants, the purchaser of a unit containing such warrant will have paid the full purchase price for the unit solely for the Class A ordinary share underlying such unit.

We are not registering the Class A ordinary shares issuable upon exercise of the warrants at this time. However, we have agreed that as soon as practicable, but in no event later than 15 business days after the closing of our initial business combination, we will use our best efforts to file with the SEC a registration statement covering the Class A ordinary shares issuable upon exercise of the warrants, to cause such registration statement to become effective and to maintain a current prospectus relating to those Class A ordinary shares until the warrants expire or are redeemed, as specified in the warrant agreement. If a registration statement covering the Class A ordinary shares issuable upon exercise of the warrants is not effective by the 60th business day after the closing of our initial business combination, warrantholders may, until such time as there is an effective registration statement and during any period when we will have failed to maintain an effective registration statement, exercise warrants on a “cashless basis” in accordance with Section 3(a)(9) of the Securities Act or another exemption. Notwithstanding the foregoing, if a registration statement covering the Class A ordinary shares issuable upon exercise of the warrants is not effective within a specified period following the completion of our initial business combination, warrant holders may, until such time as there is an effective registration statement and during any period when we shall have failed to maintain an effective registration statement, exercise warrants on a cashless basis pursuant to the exemption provided by Section 3(a)(9) of the Securities Act of 1933, as amended, or the Securities Act, provided that such exemption is available. If that exemption, or another exemption, is not available, holders will not be able to exercise their warrants on a cashless basis.

Once the warrants become exercisable, we may call the warrants for redemption:

• in whole and not in part;

• at a price of $0.01 per warrant;

• upon not less than 30 days’ prior written notice of redemption given after the warrants become exercisable (the “30-day redemption period”) to each warrantholder; and

• if, and only if, the reported last sale price of the Class A ordinary shares equals or exceeds $18.00 per share (as adjusted for share sub-divisions, share dividends, reorganizations, recapitalizations and the like) for any 20 trading days within a 30-trading day period commencing once the warrants become exercisable and ending three business days before we send the notice of redemption to the warrantholders.

If and when the warrants become redeemable by us, we may not exercise our redemption right if the issuance of ordinary shares upon exercise of the warrants is not exempt from registration or qualification under applicable state blue sky laws or we are unable to effect such registration or qualification. We will use our best efforts to register or qualify such ordinary shares under the blue sky laws of the state of residence in those states in which the warrants were offered by us in this offering.

We have established the last of the redemption criterion discussed above to prevent a redemption call unless there is at the time of the call a significant premium to the warrant exercise price. If the foregoing conditions are satisfied and we issue a notice of redemption of the warrants, each warrantholder will be entitled to exercise its warrant prior to the scheduled redemption date. However, the price of the Class A ordinary shares may fall below the $18.00 redemption trigger price (as adjusted for share sub-divisions, share dividends, reorganizations, recapitalizations and the like) as well as the $11.50 warrant exercise price after the redemption notice is issued.

If we call the warrants for redemption as described above, our management will have the option to require any holder that wishes to exercise its warrant to do so on a “cashless basis.” In determining whether to require all holders to exercise their warrants on a “cashless basis,” our management will consider, among other factors, our cash position, the number of warrants that are outstanding and the dilutive effect on our shareholders of issuing the maximum number of Class A ordinary shares issuable upon the exercise of our warrants. If our management takes advantage of this option, all holders of warrants would pay the exercise price by surrendering their warrants for that number of Class A ordinary shares equal to the quotient obtained by dividing (x) the product of the number of Class A ordinary shares underlying the warrants, multiplied by the difference between the exercise price of the warrants and the “fair market value” (defined below) by (y) the fair market value. The “fair market value” for this purpose shall mean the average reported last sale price of the Class A ordinary shares for the 10 trading days ending on the third trading day prior to the date on which the notice of redemption is sent to the holders of warrants. If our management takes advantage of this option, the notice of redemption will contain the information necessary to calculate the number of Class A ordinary shares to be received upon exercise of the warrants, including the “fair market value” in such case. Requiring a cashless exercise in this manner will reduce the number of shares to be issued and thereby lessen the dilutive effect of a warrant redemption. We believe this feature is an attractive option to us if we do not need the cash from the exercise of the warrants after our initial business combination. If we call our warrants for redemption and our management does not take advantage of this option, our sponsor and its permitted transferees would still be entitled to exercise their placement warrants for cash or on a cashless basis using the same formula described above that other warrantholders would have been required to use had all warrantholders been required to exercise their warrants on a cashless basis, as described in more detail below.

A holder of a warrant may notify us in writing in the event it elects to be subject to a requirement that such holder will not have the right to exercise such warrant, to the extent that after giving effect to such exercise, such person (together with such person’s affiliates), to the warrant agent’s actual knowledge, would beneficially own in excess of 4.9% or 9.8% (or such other amount as a holder may specify) of the Class A ordinary shares outstanding immediately after giving effect to such exercise.

If the number of outstanding Class A ordinary shares is increased by a share dividend payable in Class A ordinary shares, or by a split-up of Class A ordinary shares or other similar event, then, on the effective date of such share dividend, split-up or similar event, the number of Class A ordinary shares issuable on exercise of each whole warrant will be increased in proportion to such increase in the outstanding Class A ordinary shares. A rights offering to holders of Class A ordinary shares entitling holders to purchase Class A ordinary shares at a price less than the fair market value will be deemed a share dividend of a number of Class A ordinary shares equal to the product of (i) the number of Class A ordinary shares actually sold in such rights offering (or issuable under any other equity securities sold in such rights offering that are convertible into or exercisable for Class A ordinary shares) and (ii) one (1) minus the quotient of (x) the price per Class A ordinary share paid in such rights offering divided by (y) the fair market value. For these purposes (i) if the rights offering is for securities convertible into or exercisable for Class A ordinary shares, in determining the price payable for Class A ordinary shares, there will be taken into account any consideration received for such rights, as well as any additional amount payable upon exercise or conversion and (ii) fair market value means the volume weighted average price of Class A ordinary shares as reported during the ten (10) trading day period ending on the trading day prior to the first date on which the Class A ordinary shares trade on the applicable exchange or in the applicable market, regular way, without the right to receive such rights.

In addition, if we, at any time while the warrants are outstanding and unexpired, pay a dividend or make a distribution in cash, securities or other assets to the holders of Class A ordinary shares on account of such Class A ordinary shares (or other shares into which the warrants are convertible), other than (a) as described above, (b) certain ordinary cash dividends, (c) to satisfy the redemption rights of the holders of Class A ordinary shares in connection with a proposed initial business combination, (d) to satisfy the redemption rights of the holders of Class A ordinary shares in connection with a shareholder vote to amend our amended and restated memorandum and articles of association (i) to modify the substance or timing of our obligation to allow redemption in connection with our initial business combination or certain amendments to our articles prior thereto or to redeem 100% of our Class A ordinary shares if we do not complete our initial business combination within 18 months from the closing of this offering or (ii) with respect to any other provision relating to shareholders’ rights or pre-initial business combination activity, or (e) in connection with the redemption of our public shares upon our failure to complete our initial business combination, then the warrant exercise price will be decreased, effective immediately after the effective date of such event, by the amount of cash and/or the fair market value of any securities or other assets paid on each Class A ordinary share in respect of such event.

If the number of outstanding Class A ordinary shares is decreased by a consolidation, combination, reverse share split or reclassification of Class A ordinary shares or other similar event, then, on the effective date of such consolidation, combination, reverse share split, reclassification or similar event, the number of Class A ordinary shares issuable on exercise of each warrant will be decreased in proportion to such decrease in outstanding Class A ordinary shares.

Whenever the number of Class A ordinary shares purchasable upon the exercise of the warrants is adjusted, as described above, the warrant exercise price will be adjusted by multiplying the warrant exercise price immediately prior to such adjustment by a fraction (x) the numerator of which will be the number of Class A ordinary shares purchasable upon the exercise of the warrants immediately prior to such adjustment, and (y) the denominator of which will be the number of Class A ordinary shares so purchasable immediately thereafter.

In case of any reclassification or reorganization of the outstanding Class A ordinary shares (other than those described above or that solely affects the par value of such Class A ordinary shares), or in the case of any merger or consolidation of us with or into another corporation (other than a consolidation or merger in which we are the continuing corporation and that does not result in any reclassification or reorganization of our outstanding Class A ordinary shares), or in the case of any sale or conveyance to another corporation or entity of the assets or other property of us as an entirety or substantially as an entirety in connection with which we are dissolved, the holders of the warrants will thereafter have the right to purchase and receive, upon the basis and upon the terms and conditions specified in the warrants and in lieu of our Class A ordinary shares immediately theretofore purchasable and receivable upon the exercise of the rights represented thereby, the kind and amount of shares or other securities or property (including cash) receivable upon such reclassification, reorganization, merger or consolidation, or upon a dissolution following any such sale or transfer, that the holder of the warrants would have received if such holder had exercised their warrants immediately prior to such event. If less than 70% of the consideration receivable by the holders of Class A ordinary shares in such a transaction is payable in the form of Class A ordinary shares in the

successor entity that is listed for trading on a national securities exchange or is quoted in an established over-the-counter market, or is to be so listed for trading or quoted immediately following such event, and if the registered holder of the warrant properly exercises the warrant within thirty days following public disclosure of such transaction, the warrant exercise price will be reduced as specified in the warrant agreement based on the Black-Scholes value (as defined in the warrant agreement) of the warrant. The purpose of such exercise price reduction is to provide additional value to holders of the warrants when an extraordinary transaction occurs during the exercise period of the warrants pursuant to which the holders of the warrants otherwise do not receive the full potential value of the warrants in order to determine and realize the option value component of the warrant. This formula is to compensate the warrant holder for the loss of the option value portion of the warrant due to the requirement that the warrant holder exercise the warrant within 30 days of the event. The Black-Scholes model is an accepted pricing model for estimating fair market value where no quoted market price for an instrument is available.

The warrants will be issued in registered form under a warrant agreement between Continental Stock Transfer & Trust Company, as warrant agent, and us. You should review a copy of the warrant agreement, which will be filed as an exhibit to the registration statement of which this prospectus is a part, for a complete description of the terms and conditions applicable to the warrants. The warrant agreement provides that the terms of the warrants may be amended without the consent of any holder to cure any ambiguity or correct any defective provision, but requires the approval by the holders of at least a majority of the then outstanding public warrants to make any change that adversely affects the interests of the registered holders of public warrants.

In addition, if (x) we issue additional Class A ordinary shares or equity-linked securities for capital raising purposes in connection with the closing of our initial business combination at a Newly Issued Price of less than $9.20 per Class A ordinary share (with such issue price or effective issue price to be determined in good faith by our board of directors and, in the case of any such issuance to our sponsor or its affiliates, without taking into account any founder shares held by our sponsor or such affiliates, as applicable, prior to such issuance), (y) the aggregate gross proceeds from such issuances represent more than 60% of the total equity proceeds, and interest thereon, available for the funding of our initial business combination on the date of the completion of our initial business combination (net of redemptions), and (z) the Market Value is below $9.20 per share, then the exercise price of the warrants will be adjusted (to the nearest cent) to be equal to 115% of the greater of the Market Value and the Newly Issued Price, and the $18.00 per share redemption trigger price described above will be adjusted (to the nearest cent) to be equal to 180% of the greater of the Market Value and the Newly Issued Price.

The warrants may be exercised upon surrender of the warrant certificate on or prior to the expiration date at the offices of the warrant agent, with the exercise form on the reverse side of the warrant certificate completed and executed as indicated, accompanied by full payment of the exercise price (or on a cashless basis, if applicable), by certified or official bank check payable to us, for the number of warrants being exercised. The warrantholders do not have the rights or privileges of holders of Class A ordinary shares and any voting rights until they exercise their warrants and receive Class A ordinary shares. After the issuance of Class A ordinary shares upon exercise of the warrants, each holder will be entitled to one (1) vote for each share held of record on all matters to be voted on by shareholders.

No fractional shares will be issued upon exercise of the warrants. If, upon exercise of the warrants, a holder would be entitled to receive a fractional interest in a share, we will, upon exercise, round down to the nearest whole number of Class A ordinary shares to be issued to the warrantholder.

We have agreed that, subject to applicable law, any action, proceeding or claim against us arising out of or relating in any way to the warrant agreement will be brought and enforced in the courts of the State of New York or the United States District Court for the Southern District of New York, and we irrevocably submit to such jurisdiction, which jurisdiction will be the exclusive forum for any such action, proceeding or claim. This provision applies to claims under the Securities Act but does not apply to claims under the Exchange Act or any claim for which the federal district courts of the United States of America are the sole and exclusive forum.