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
Step in HMP pathway requiring TPP 
Select and explain. 
A. G6PD, B. 6 Phosphogluconate dehydrogenase, C. Transketolase, D. Transaldolase
C: Transketolase
Answer: C: Transketolase 
Explanation: Transketolase requires thiamine pyrophosphate (TPP).