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
Coenzyme, in an enzymatic reaction usually functions to : 
Select and explain. 
A. Activate the substrate, B. Increase the active sites of apoenzyme, C. Enhance the specificity of aponzyme, D. Accept one of the cleavage products
D: Accept one of the cleavage products
Answer: D: Accept one of the cleavage products 
Explanation: 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.