BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Two amino acids have acidic side chains at neutral pH. These are aspartic acid or aspartate (Asp) and glutamic acid or glutamate (Glu).

Detailed explanation-2: -Amino acids are amphoteric, meaning they have both acidic and basic properties. An animo acid has at least one primary amine group, NH2, and at least one carboxyl group, COOH. In an acidic environment where the concentration of protons in solution is high, protons from the solution are donated to the amine group.

Detailed explanation-3: -Cysteine (Cys/C) is the only amino acid with a sulfhydryl group in its side chain.

Detailed explanation-4: -Each amino acid is bound to a unique chemical group at this position called its side chain. It is this side chain that makes each amino acid different, giving each amino acid a unique set of chemical properties. The side chain is often abbreviated as an R group and denoted with the letter R for short.