Krebs Cycle (TCA): Steps and Significance · NCERT Biology

During the conversion of Alpha-ketoglutarate to Succinyl-CoA, which two processes occur simultaneously?

  1. Hydration and Oxidation
  2. Oxidation and Decarboxylation
  3. Reduction and Carboxylation
  4. Isomerization and Phosphorylation
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Correct answer: Oxidation and Decarboxylation

This step is an oxidative decarboxylation. A molecule of CO2 is removed (decarboxylation) and NAD+ is reduced to NADH (oxidation of the substrate).

Difficulty: Medium Question 16 of 20

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