This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitamins, Subject name: Biochemistry
[{'content': 'Methylcobalamin is required for which of the following enzymes: \nSelect and explain. \nA. Homocysteine deaminase, B. Homocysteine methyl transferase, C. Methionine synthase, D. Methionine reductase', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) Methionine synthaseRef.: Harpers Biochemistry 30th edn. 1558B CONVERSION OF HOMOCYSTEINE TO METHIONINE* Active form in this reaction is methycobalamin. This reaction requires both methylcobalamin and folic acid. The reaction is catalyzed by methionine synthase which is a methylcobalamin dependent reaction.HomocysteineMethionine synthase-------------------------Methylcobalamin + folic acidMethionine', 'role': 'assistant'}]