Question

1. the quaternary structure of proteins: (1 point) * a) includes more than one polypeptide chain b) exists only in single polypeptides c) occurs only in fibrous proteins d) is not affected by denaturation

Explanation:

The quaternary structure of proteins is formed by the interaction of multiple polypeptide chains. Denaturation can disrupt this structure. It is not limited to single - polypeptides or only fibrous proteins.

Answer:

A. Includes more than one polypeptide chain