This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET 2019, Subject name: Biochemistry
[{'content': 'Creatinine, NO & urea are synthesized from which amino acid? \nSelect and explain. \nA. Arginine, B. Citrulline, C. Aspaate, D. Glycine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 1. Creatinine - Three amino acid -glycine, arginine and methionine-are required for creatine formation FORMATION OF CREATININE 2. NO is synthesized from arginine by enzyme NOS (Nitric Oxide Synthase). FORMATION OF NO 3. Urea is formed from arginine by enzyme arginase UREA CYCLE', 'role': 'assistant'}]