BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Quaternary structure exists in proteins consisting of two or more identical or different polypeptide chains (subunits). These proteins are called oligomers because they have two or more subunits. The quaternary structure describes the manner in which subunits are arranged in the native protein.

Detailed explanation-2: -The quaternary structure of a protein is the association of several protein chains or subunits into a closely packed arrangement. Each of the subunits has its own primary, secondary, and tertiary structure.

Detailed explanation-3: -Quaternary structure However, some proteins are made up of multiple polypeptide chains, also known as subunits. When these subunits come together, they give the protein its quaternary structure.

Detailed explanation-4: -Answer and Explanation: (d.) The interaction of protein subunits is associated with the quaternary structure of proteins.

Detailed explanation-5: -There are two major categories of proteins with quaternary structure-fibrous and globular. Fibrous Proteins: Actually, the final beta-pleated sheet structure of silk is the result of the interaction of many individual protein chains.