The association of two or more polypeptides in a multimeric protein is know as the:
A) Primary structure
B) Secondary structure
C) Tertiary structure
D) Quaternary structure
E) None of these

Question

Quizplus · Accepted Answer

The quaternary structure refers to the association of two or more polypeptides to form a functional protein. The primary structure refers to the sequence of amino acids in a single polypeptide chain, the secondary structure refers to the local folding patterns of the polypeptide chain, and the tertiary structure refers to the overall 3D shape of a single polypeptide chain. Therefore, the best answer is D – quaternary structure.

The Association of Two or More Polypeptides in a Multimeric