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': 'The property of protein to absorb UV rays of light is due to: \nSelect and explain. \nA. Peptide bond, B. Imino group, C. Disulfide bond, D. Aromatic amino acid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Aromatic amino acids:-\nAmino Acid Absorb UV Light:\xa0\nAmino Acids which absorb 250-290 nm (Maximum at 280 nm) UV light are tryptophan, phenylalanine, tyrosine. Maximum absorption of UV light by tryptophan.\xa0\nRemember:\xa0\n\nAromatic amino acids absorb UV light.\xa0\nAmino acids are colorless\xa0because, they do not absorb visible light.', 'role': 'assistant'}]