BIOMOLECULES AND ENZYMES

Detailed explanation-1: -The complete structure of a protein can be described at four different levels of complexity: primary, secondary, tertiary, and quaternary structure.

Detailed explanation-2: -Many proteins are made up of a single polypeptide chain and have only three levels of structure (the ones we’ve just discussed). 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-3: -Quaternary Structure. Quaternary Structure refers to the structure of a protein macromolecule formed by interactions between multiple polypeptide chains. Each polypeptide chain is referred to as a subunit.

Detailed explanation-4: -Proteins contain the elements carbon, hydrogen, and oxygen just as carbohydrates and lipids do, but proteins are the only macronutrient that contains nitrogen. In each amino acid the elements are arranged into a specific conformation around a carbon center.