BIOMOLECULES AND ENZYMES

Detailed explanation-1: -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. The subunits are held together by hydrogen bonds and van der Waals forces between nonpolar side chains.

Detailed explanation-2: -4.5 Quaternary Structure 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.

Detailed explanation-3: -Quaternary structure: Quaternary structure is the three-dimensional structure of a protein macromolecule formed by aggregation of two or more individual polypeptide chains.

Detailed explanation-4: -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.