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Question

In aerobic respiration, the first CO2 is liberated during ______.


A

Oxidation of pyruvic acid

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B

Decarboxylation of oxalosuccinic acid

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C

Decarboxylation of a ketoglutaric acid

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D

Alcoholic fermentation

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Solution

The correct option is A

Oxidation of pyruvic acid


In aerobic respiration, the first CO2 is liberated during oxidation of pyruvate. Here pyruvate a 3C compound is broken down to acetate, a 2C compound and linked to CoA to form acetyl CoA. The Carbon lost from pyruvate is released as CO2. And the acetyl CoA formed is funneled into the Kreb's cycle.


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