BIOMOLECULES AND ENZYMES

Detailed explanation-1: -The 9 essential amino acids are: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.

Detailed explanation-2: -Only four essential amino acids are likely to affect the protein quality of mixed human diets: lysine, the sulfur-containing amino acids (methionine plus cystine), threonine, and tryptophan.

Detailed explanation-3: -Threonine (Thr), otherwise known as -amino--hydroxybutyric acid, is an indispensable amino acid in animals that must be obtained from the diet [1].

Detailed explanation-4: -Isoleucine, leucine, threonine, lysine, methionine, phenylalanine, tryptophan, and valine are essential amino acids. The non-essential amino acids are alanine, asparagine, aspartic acid, cysteine, glutamine, glutamic acid, glycine, proline, serine and tyrosine. Q.