Identify the step in the tricarboxylic acid cycle that does not involve oxidation of the substrate: - Botany MCQ NEET 2024 R1@NUM: 147 2026 | ExamTest.live | ExamTest.live

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Identify the step in the tricarboxylic acid cycle that does not involve oxidation of the substrate:

A $Succinic acid \to Malic acid$
B $Succinyl-CoA \to Succinic acid$
C $Isocitrate \to α -ketoglutaric acid$
D $Malic acid \to Oxaloacetic acid$

Solution & Step-by-step Explanation

The conversion of Succinyl-CoA to Succinic acid is a substrate-level phosphorylation step producing GTP (or ATP). It does not involve the reduction of NAD^{+} or FAD, hence no oxidation of the substrate.

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Identify the step in the tricarboxylic acid cycle that does not involve oxidation of the substrate:

A

Succinic acid \to Malic acid

B

Succinyl-CoA \to Succinic acid

C

Isocitrate \to α -ketoglutaric acid

D

Malic acid \to Oxaloacetic acid

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Respiration TCA Cycle

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