REVELATION BIOSCIENCES, INC. 10-Q

ITEM 5. OTHER INFORMATION None. Item 6. Exhibits (d) Exhibits: Exhibit Description 3.1 Certificate of Incorporation(2) 3.2 Second Amended and Restated Certificate of Incorporation(1) 3.3 Bylaws(2) 4.1 Specimen Unit Certificate.(2) 4.2 Specimen Common Stock Certificate.(2) 4.3 Specimen Warrant Certificate.(2) 4.4 Warrant Agreement, dated October 7, 2020, between Continental Stock Transfer & Trust Company and the Company(1) 4.5 Description of Registrant’s Securities.(3) 10.1 Investment Management Trust Agreement, dated October 7, 2020, between Continental Stock Transfer & Trust Company and the Company.(1) 10.2 Escrow Agreement, dated October 7, 2020, by and among the Company, Continental Stock Transfer & Trust Company and the Company’s Initial Stockholders.(1) 10.3 Registration Rights Agreement, dated October 7, 2020, between the Company and Investors.(1) 10.4 Subscription Agreement, dated October 7, 2020, between the Company and Petra Investment Holdings LLC(1) 10.5 Business Combination Marketing Agreement, dated October 7, 2020, by and among the Company, LifeSci Capital LLC, Ladenburg Thalmann & Co. Inc., Northland Securities, Inc., and Ingalls & Snyder LLC(1) 10.6 Form of Letter Agreement from each of the Registrant’s initial shareholders, officers and directors.(3) 14 Code of Ethics.(2) 31.1* Certification of Principal Executive Officer Pursuant to Securities Exchange Act Rules 13a-14(a) and 15(d)-14(a), as adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 31.2* Certification of Principal Financial Officer Pursuant to Securities Exchange Act Rules 13a-14(a) and 15(d)-14(a), as adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 32.1** Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350, as adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 32.2** Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 101.INS* Inline XBRL Instance Document 101.CAL* Inline XBRL Taxonomy Extension Calculation Linkbase Document 101.SCH* Inline XBRL Taxonomy Extension Schema Document 101.DEF* Inline XBRL Taxonomy Extension Definition Linkbase Document 101.LAB* Inline XBRL Taxonomy Extension Labels Linkbase Document 101.PRE* Inline XBRL Taxonomy Extension Presentation Linkbase Document 104 Cover Page Interactive Data File (embedded within the Inline XBRL document) (1) Previously filed as an exhibit to our Current Report on Form 8-K filed on October 13, 2020. (2) Previously filed as an exhibit to our Form S-1, filed on September 21, 2020 (3) Previously filed as an exhibit to our Form 10-K, filed on March 31, 2021 * Filed herewith. ** Furnished. 20 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. PETRA ACQUISITION, INC. Date: August 23, 2021 By: /s/ Andreas Typaldos Andreas Typaldos, Chief Executive Officer ( Principal Executive Officer ) Date: August 23, 2021 By: /s/ Sean Fitzpatrick Sean Fitzpatrick, Chief Financial Officer (Principal Financial and Accounting Officer) 21