This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Structure & Function of Protein, Subject name: Biochemistry
[{'content': 'The enzyme trypsin is specific for peptide bonds of: \nSelect and explain. \nA. Basic amino acids, B. Acidic amino acids, C. Aromatic amino acids, D. Next to small amino acid residues', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. Basic amino acidsTrypsin is an endopeptidase which cleave protein chains at internal peptidebonds, but each preferentially hydrolyses bonds adjacent to a particular type of amino acid residue. Trypsin cuts just next to basic residues (lysine or arginine); chymotrypsin cuts next to aromatic residues (phenylalanine, tyrosine or tryptophan).', 'role': 'assistant'}]