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
Enzyme Transketolase requires ? 
Select and explain. 
A. FAD, B. TPP, C. PLP, D. FMN
B: TPP
Answer: B: TPP 
Explanation: Transketolase reactions require thiamine pyrophosphate (TPP).Coenzyme can be classified according to the group whose transfer they facilitate.a) For transfer groups other than hydrogen :- Sugar phosphate, CoA-SH, thiamine pyrophosphate (TPP), Pyridoxal phosphate, Folate, Biotin.b) For transfer of hydrogen : - NAD+, NADP+, FMN, FAP, Lipoic acid,Coenzyme Q.