BotanyOxidative decarboxylation is observed in which step of aerobic respiration?

Oxidative decarboxylation is observed in which step of aerobic respiration?

  1. A

    Conversion of oxaloacetic acid to citric acid

  2. B

    Conversion of succinic acid to fumaric acid

  3. C

    Conversion of phosphoenolpyruvate to pyruvic acid

  4. D

    Conversion of pyruvic acid to acetyl CoA

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    Solution:

    Pyruvate, which is formed by the glycolytic catabolism of carbohydrates in the cytosol, enters into mitochondrial matrix and undergoes oxidative decarboxylation by a complex set of reactions catalysed by pyruvic dehydrogenase. The reactions catalysed by pyruvic dehydrogenase requires the participation of several coenzymes, including NAD+ and Coenzyme A.

    Pyruvic acid+CoA+NAD+Pyruvate dehydrogenaseMg2Acetyl CoA+CO2+NADH+H+

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