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': 'Coenzyme, in an enzymatic reaction usually functions to : \nSelect and explain. \nA. Activate the substrate, B. Increase the active sites of apoenzyme, C. Enhance the specificity of aponzyme, D. Accept one of the cleavage products', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Coenzymes act either a donar or an acceptor of group. They serve as recyclable shuttles - or group transfer agents - that transpo many substrates from their point of generation to their point of utilization.', 'role': 'assistant'}]