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': 'All the following are biotin independent carboxylation reactions, EXCEPT \nSelect and explain. \nA. Addition of CO2 to from C6 in purine ring, B. Conversion of pyruvate to malate by malic enzyme, C. Acetyl CoA carboxylase, D. Carbamoyl phosphate synthetase', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The\xa0 conversion of\xa0 pyruvate to\xa0 oxaloacetate by\xa0 biotin\xa0 dependent\xa0 pyruvate\xa0 carboxylase\xa0is essential for the synthesis of glucose from\xa0 many non-carbohydrate sources.', 'role': 'assistant'}]