NURSING ANM AND GNM

Detailed explanation-1: -The primary structure is comprised of a linear chain of amino acids. The secondary structure contains regions of amino acid chains that are stabilized by hydrogen bonds from the polypeptide backbone. These hydrogen bonds create alpha-helix and beta-pleated sheets of the secondary structure.

Detailed explanation-2: -The answer is a. The primary structure which corresponds to the sequence of the amino acids is stabilized only by the peptide bond and not by any intermolecular forces of attraction such as hydrogen bonding. Secondary, tertiary, and quaternary structures, on the other hand, can be stabilized by hydrogen bonding.

Detailed explanation-3: -The answer is (c) Tertiary and quaternary. Interactions like hydrogen bonding among amino side chains stabilize the tertiary and quaternary structures of proteins.

Detailed explanation-4: -Answer and Explanation: The stretch of amino acids in a polypeptide chain constitutes the primary structure of proteins. Because the primary level of protein structure is formed by covalent bonds, i.e., peptide bonds, hydrogen bonding disruption has the least effect on it.