This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Carbohydrates, Subject name: Biochemistry
Importance of pyruvate to lactate formation in anaerobic glycolysis is production of: 
Select and explain. 
A. FAD, B. NADHtoNAD, C. ATP, D. NAD to NADH
B: NADHtoNAD
Answer: B: NADHtoNAD 
Explanation: B i.e. NADH to NADRef: Internet SourceExplanation:A cell can perform aerobic respiration through TCA cycle in mitochondria, in situations when there is no oxygen/mitochondria (RBC), it will perform anaerobic respiration.NAD produced in the reaction catalyzed by LDH is used to maintain glycolysis. If NAD is deficient, Glycolysis will come to halt.