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
Which among the following controls is an allosteric inhibitor of TCA cycle: 
Select and explain. 
A. Pyruvate dehydrogenase, B. Keto glutarate dehydrogenase, C. Isocitrate dehydrogenase, D. Malate dehydrogenase
C: Isocitrate dehydrogenase
Answer: C: Isocitrate dehydrogenase 
Explanation: C i.e. Isocitrate dehydrogenase The enzyme of TCA cycle having allosteric inhibitor is isocitrate dehydrogenaseQ. The allosteric activator is ADP and allosteric inhibitor is ATP and long chain aceyl COA