Question

Which of the following statements about peptide bonds are true?

A. Peptide bonds are ester linkages.

B. Peptides are polymers of amino acids.

C. Peptide bond formation is a hydrolysis reaction.

D. A tripeptide contains three amino acid residues.

E. Peptide bonds form from nucleophilic attack by an α-carboxyl carbon atom on an electron pair of an α-amino nitrogen atom of another amino acid.