TCA Cycle

Q1: Which of the following enzyme does not take part in the TCA cycle?

A Pyruvate dehydrogenase

B Citrate synthase

C Iso-citrate dehydrogenase

D Malate dehydrogenase

ANS:C - Pyruvate dehydrogenase

Pyruvate Dehydrogenase doesn't take part in TCA cycle activity, what it does is that it produce the acetyl coA to be used to produce Citrate when the Acetyl coA condenses with Oxaloacetate.

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