NEET BIOLOGY

Detailed explanation-1: -(a) The primary structure of a protien refers to a linear sequence of amino acids in polypeptide chain, held together by peptide bonds. These are two ends of a polypeptide chain, carboxyl terminus (C-terminus) and the amino terminus (N-terminus) based on the nature of the free group on each extremity.

Detailed explanation-2: -The two ends of each polypeptide chain are known as the amino terminus (N-terminus) and the carboxyl terminus (C-terminus). Twenty different amino acids can be used multiple times in the same polypeptide to create a specific primary protein structure sequence.

Detailed explanation-3: -Solution : Primary structure of a protein is simply the amino acid sequence which has two ends the caboxyl and amino terminals.

Detailed explanation-4: -The primary structure of a protein-its amino acid sequence-drives the folding and intramolecular bonding of the linear amino acid chain, which ultimately determines the protein’s unique three-dimensional shape.

Detailed explanation-5: -They are found to exist in two different types of structures – helix and – pleated sheet structures. This structure arises due to the regular folding of the backbone of the polypeptide chain due to hydrogen bonding between-CO group and-NH groups of the peptide bond.