<prompt> Acidic property to a-carbon of amino acid is due to-Carboxyl groupAmino groupHydrogenatomNone  <response>: Ans. is a i.e., Carboxyl groupo The acid base properties of amino acids depend on the amino and carboxyl groups attached to the a-carbon.i The carboxyl -COOH group of an amino acid can donate protein H and behave as an acid forming a negatively charged anion COO-.ii Amino group -NH2 can accept proton H and behave as a base, forming positively charged cation NH3. o Thus, amino acids in aqueous solution are ionized and act as acids and bases. 