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': 'Selenocysteine is associated with ? \nSelect and explain. \nA. Carbonic anhydrase, B. Catalase, C. Deiodinase, D. Transferase', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Selenocysteine is considered as 21 standard amino acid.It is present at the active site of some enzymes that catalyze redox reactions, e.g. thioredoxin reductase, glutathione peroxidase, and the deiodinase (conves thyroxin to triiothyronine).', 'role': 'assistant'}]