NTA Abhyas NEET2020BotanyRespiration in PlantsPractice
Reduction of NAD does not occur in which of the following?
Options
- AIsocitric acid → α -ketoglutaric acid
- BMalic acid → Oxaloacetic acid
- CPyruvic acid → Acetyl coenzyme
- DSuccinic acid → Fumaric acid
Correct answer
D. Succinic acid → Fumaric acid
Step-by-step solution
During the step of Krebs' cycle, where succinic acid undergoes oxidation or dehydrogenation to form Fumaric acid, FAD is reduced to FADH 2 and enzyme involved in this step is succinic acid dehydrogenase. Conversion of isocitric acid to α -ketoglutaric acid, malic acid to oxaloacetic acid and pyruvic acid to acetyl Co-A, all involve the reduction of NAD to NADH + H + .