This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Amino Acids Basics, Subject name: Biochemistry
[{'content': 'Acidic property to a-carbon of amino acid is due to- \nSelect and explain. \nA. Carboxyl group, B. Amino group, C. Hydrogenatom, D. None', 'role': 'user'}, {'content': "Answer: A \nExplanation: 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.", 'role': 'assistant'}]