1. Tardigrade
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  4. 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.

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Q. 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.

Respiration in Plants

Solution:

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 $CoA + OAA + H_2O$ $\xrightarrow[\text{synthetase}] {\text{Citrate}}$ Citrate $+ CoA$