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MHT CET Medical202621 April 2026Evening ShiftBiologyRespiration in PlantsActual

Which of the following reactions is the decarboxylation reaction?

Options

  1. AOxalosuccinic acid -Ketoglutarate
  2. BSuccinic acid Fumaric acid
  3. CCis-aconitate Isocitric acid
  4. DIsocitrate Oxalosuccinic acid

Correct answer

A. Oxalosuccinic acid -Ketoglutarate

Step-by-step solution

In the Krebs cycle, oxalosuccinic acid is a 6-carbon compound that undergoes decarboxylation to form -ketoglutarate, which is a 5-carbon compound, releasing one molecule of CO₂ . Succinic acid Fumaric acid is an oxidation (dehydrogenation) reaction where FAD is reduced to FADH₂ . Cis-aconitate Isocitric acid is a hydration reaction involving the addition of a water molecule. Isocitrate Oxalosuccinic acid is an oxidation (dehydrogenation) reaction where NAD^+ is reduced to NADH + H^+ . Therefore, the decarboxylation

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