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NTA Abhyas NEET2020BotanyRespiration in PlantsPractice

The first reaction of Kreb's cycle includes:

Options

  1. ACondensation of citric acid with acetyl CoA and formation of alpha-ketoglutaric acid
  2. BCondensation of cis-aconitic acid with acetyl coenzyme-A and formation of citric acid
  3. CCondensation of oxalosuccinic acid with acetyl CoA and formation of citric acid
  4. DCondensation of oxaloacetic acid with acetyl CoA and formation of citric acid

Correct answer

D. Condensation of oxaloacetic acid with acetyl CoA and formation of citric acid

Step-by-step solution

After oxidative decarboxylation of pyruvate, Acetyl CoA is formed which then combines with oxaloacetic acid in a condensation reaction to form citric acid.

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