This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Structure and function of protein, Subject name: Biochemistry
[{'content': 'Most abundant in bone \nSelect and explain. \nA. Alanine, B. Hydroxyproline, C. Lysine, D. Arginine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Hydroxyproline is catabolized more or less similar to proline. It is confer strength to fibrous proteins like collagen , elastin, keratin.etc.In vitamin C deficiency hydroxyproline synthesis is reduced , causing strength of fibers , leading to scurvy. The excretion of hydroxyproline in urine is increased in tumours infiltrating bones and in diabetic patients due to enhanced rate of protein catabolism. REFERENCE: DM.VASUDEVAN.TEXTBOOK SEVENTH EDITION ;PAGE NO : 244', 'role': 'assistant'}]