NURSING ANM AND GNM

Detailed explanation-1: -The most common types of secondary structures are the helix and the pleated sheet. Both structures are held in shape by hydrogen bonds, which form between the carbonyl O of one amino acid and the amino H of another.

Detailed explanation-2: -Answer and Explanation: 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-3: -The sequence of amino acids in a protein is called its primary structure. The secondary structure is determined by the dihedral angles of the peptide bonds, the tertiary structure by the folding of protein chains in space.

Detailed explanation-4: -Proteins have four levels of organization. Primary structure refers to the linear sequence of the amino acids connected by the peptide bonds. The secondary structure consists of local packing of polypeptide chain into -helices and -sheets due to hydrogen bonds between peptide bond – central carbon backbone.

Detailed explanation-5: -Protein structures are also classified by their secondary structure. Secondary structure refers to regular, local structure of the protein backbone, stabilised by intramolecular and sometimes intermolecular hydrogen bonding of amide groups.