Which of the Following Statements About Peptides is Correct

Question

Which of the following statements about peptides is correct?
A) A peptide bond is formed by a condensation reaction between two carboxyl groups.
B) Joining two amino acids together through a peptide bond results in the formation of a carboxyl group.
C) As a whole, the structure of the peptide- bonded backbone is flexible.
D) A peptide bond is formed by a condensation reaction between the carboxyl and amino group of the same amino acid.
E) The peptide bond is capable of rotating.

Accepted Answer

The structure of the peptide-bonded backbone is indeed flexible, allowing proteins to fold into various shapes and conformations, which is crucial for their biological function. This flexibility is due to the rotation around bonds adjacent to the peptide bond, not the peptide bond itself, which is relatively rigid due to its partial double-bond character.