This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of carbohydrate, Subject name: Biochemistry
Arsenite inhibits 
Select and explain. 
A. Enolase, B. G-6-PD, C. Alpha ketoglutarate dehydrogenase, D. Hexokinase
C: Alpha ketoglutarate dehydrogenase
Answer: C: Alpha ketoglutarate dehydrogenase 
Explanation: Alpha ketoglutarate dehydrogenase (alpha ketoglutarate to succinyl CoA) is inhibited by Arsenite. This is a non-competitive inhibition. Ref: DM VASUDEVAN TEXTBOOK OF BIOCHEMISTRY, SIXTH EDITION,PG.NO.,222.