This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'Acidic propey to a-carbon of amino acid is due to \nSelect and explain. \nA. Carboxyl group, B. Amino group, C. Hydrogen atom, D. None', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Carboxyl groupThe acid base propeies of amino acids depend on the amino and carboxyl groups attached to the a-carbon.The carboxyl (-COOH) group of an amino acid can donate protein (H') and behave as an acid forming a negatively charged anion (C00-).Amino group (-NH) can accept proton (H') and behave as a base, forming positively charged cation (NH3').", 'role': 'assistant'}]