This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of nucleic acids, Subject name: Biochemistry
[{'content': 'Glycine provides all in purine synthesis except \nSelect and explain. \nA. Carbon-4, B. Carbon-5, C. Nitrogen-4, D. Nitrogen-7', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Amino group of aspaate provide N1 Formyl THFA - C2 Amide N of glutamine - N3 and N9 glycine- C4 C5 C7 respiratory Co2- C6 Methenyl THFA -C8 Ref-Harpers illustrated biochemistry 30/e p849', 'role': 'assistant'}]