Peptide bonds are ________.

A) ester linkages
B) imido linkages
C) ether linkages
D) amide linkages
E) disulfide linkages

Peptide Bonds

The chemical bonds formed between the carboxyl group of one amino acid and the amino group of another, linking them together in a protein or peptide chain.

Amide Linkages

Chemical bonds formed by the reaction between the carbonyl group of an acid and the amino group of an amine, characteristic of polymers like nylon and proteins.