BIOMOLECULES AND ENZYMES

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: -The random coil is not a true secondary structure, but is the class of conformations that indicate an absence of regular secondary structure. Amino acids vary in their ability to form the various secondary structure elements.

Detailed explanation-3: -Secondary structure refers to regular, local structure of the protein backbone, stabilised by intramolecular and sometimes intermolecular hydrogen bonding of amide groups.

Detailed explanation-4: -Secondary structure refers to regular, recurring arrangements in space of adjacent amino acid residues in a polypeptide chain. It is maintained by hydrogen bonds between amide hydrogens and carbonyl oxygens of the peptide backbone. The major secondary structures are -helices and -structures.

Detailed explanation-5: -The tertiary structure of proteins represents overall folding of the polypeptide chains, further folding of the secondary structure. It gives rise to two major molecular shapes called fibrous and globular.