Power of Attorney for William Schelman

This document details a Power of Attorney granted by William Schelman, Chief Medical Officer of Bicara Therapeutics Inc., to certain individuals, including Claire Mazumdar, Ryan Cohlhepp, Ivan Hyep, and Lara Meisner, as well as Gabriela Morales-Rivera. The attorneys-in-fact are authorized to execute SEC filings, including Forms 3, 4, and 5, and Schedules 13D and 13G, on behalf of Mr. Schelman. This authorization covers the necessary actions to complete, execute, and file these forms with the SEC and other relevant authorities. The Power of Attorney also includes the authority to make amendments and take any other actions deemed beneficial or legally required. The document specifies that the attorneys-in-fact and the Company are not assuming Mr. Schelman's compliance responsibilities. Mr. Schelman agrees to indemnify the attorneys-in-fact against any claims arising from false information provided. The Power of Attorney remains in effect until Mr. Schelman is no longer required to file such forms or until it is revoked. It supersedes any prior powers of attorney and will expire for individual attorneys-in-fact if they cease to be employed by the Company or Goodwin Procter LLP. The filing also includes details of stock options granted to William Schelman, with specific vesting conditions outlined in footnotes.