In Krebs cycle, second decarboxylation occurs during

Pyruvate Acetyl CoA

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-Ketoglutarate Succinyl CoA

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Oxalosuccinic acid -Ketoglutarate

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Malic acid Fumaric acid

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Solution

The correct option is B -Ketoglutarate Succinyl CoA
In Krebs' cycle, decarboxylation occurs twice during the completion of one cycle. Second decarboxylation occurs when ketoglutarate (5) is converted to succinyl CoA (4 C) by ketoglutarate dehydrogenase liberating CO2.
So the answer is 'Ketoglutarate Succinyl CoA'.

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