Which functional group is not present in this tripeptide?

Question

Quizplus · Accepted Answer

A tripeptide is composed of three amino acids linked together by peptide bonds. Amino acids have an amine group (-NH2) and a carboxyl group (-COOH) attached to the same carbon atom. These groups react to form a peptide bond (-CONH-), which links the amino acids together. The remaining functional groups present in the amino acids that could be found in a tripeptide are amide, carbonyl, amine, and methyl. Alcohol is not a functional group present in amino acids or peptides.

Which Functional Group Is Not Present in This Tripeptide