BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Explanation: Because of the tyrosine hydroxyl group and the nitrogen of the tryptophan indole ring, tryptophan and tyrosine are substantially more polar than phenylalanine.

Detailed explanation-2: -Phenylalanine, tyrosine and tryptophan all contain non-polar aromatic rings. Tyrosine and tryptophan are slightly less hydrophobic and slightly more reactive than phenylalanine because they contain an-OH and-NH group, respectively.

Detailed explanation-3: -Polar amino acids For example, serine (Ser, S), threonine (Thr, T), and tyrosine (Tyr, Y) are polar since they carry a hydroxylic (-OH) group.

Detailed explanation-4: -Phenylalanine and Tyrosine. Phenylalanine is an essential amino acid meaning that it cannot be made in the body and must be ingested in the diet. Tyrosine is a nonessential amino acid and can be formed by the hydroxylation of phenylalanine in the liver when the intake of tyrosine in the diet is low.

Detailed explanation-5: -Indeed, tryptophan, despite its hydrogen donor atom, has been classified in the IMGT ‘nonpolar’ class, as it participates to the nonpolar core of the structural domains.