Which of the statements about peptide bonds are true?

a. Peptides are polymers of proteins.
b. Peptide bond formation is a hydrolysis reaction.
c. A tetrapeptide contains five amino acid residues.
d. Peptide bonds are amide linkages.

Option D) Peptide bonds are amide linkages.

Explanation:

A peptide bond is formed between two amino acids with the loss of one molecule of water and the formation of an amide (CO-NH2) bond.

Usually the carboxyl group (COOH) of the first amino acid links with the amino group (NH2) with the loss of H2O, thus forming an amide linkage

The options are not complete and the given options are wrong.

Option E. Tripeptide contain three amino acids residue is the correct answer.

Explanation:

Peptide bond are covalent chemical bond that link two molecules which are formed when one molecule of carboxyl group react with one molecule of amino group releasing a molecule of water. It is a condensation reaction and take place between amino acids. A tripeptide contain three amino acids residue with three peptide bond.