MCQ – 21225

In the TCA cycle, CO₂ is released from:

A.	Thiokinase
B.	Isocitrate dehydrogenase
C.	Citrate dehydrogenase
D.	Alpha ketoglutrate

Show Answer

Correct Answer � B Explanation

B i.e. Isocitrate dehydrogenase

2 molecules of carbon dioxide are released in the TCA cycle. One before and one after α- ketoglutarate.

Enzymes used are – isocitrate dehydrogenase and α-ketoglutarate dehydrogenase respectively.