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': 'Enzyme in fatty acid synthase complex that has pantothenic acid as coenzyme: \nSelect and explain. \nA. Acetyl transacylase., B. Thioesterase., C. Enoyl reductase., D. Acyl carrier protein.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: In eukaryotic cells, including man, the fatty acid synthase exists as a dimmer with two identical units. Each monomer possesses the activities of seven different enzymes and an acyl carrier protein (ACP) bound to 4’ phosphopentethiene.', 'role': 'assistant'}]