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Assertion : The first step in TCA cycle ...

Assertion : The first step in TCA cycle is the condensation of pyruvate with oxaloacetic acid and water.
Reason : This reaction is catalysed by enzyme pyruvate synthase.

A

If both assertion and reason are true and reason is the correct explanation of assertion

B

If both assertion and reason are true but reason is not the correct explanation of assertion

C

If assertion is true but reason is false

D

If both assertion and reason are false

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The correct Answer is:
d
The TCA cycle starts with the condensation of acetyl group with oxaloacetic acid (OAA) and water to yield citric acid. The reaction is catalysed by the enzyme citrate synthetase and a molecule of CoA is released.
Acetyl `CoA + OA A + H_(2)O underset("synthetase")overset("Citrate")(rarr) " Citrate " + CoA`
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