In how many steps, $C O_{2}$ is released in aerobic respiration of pyruvic acid?

One

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Six

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Three

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Twelve

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Solution

The correct option is C Three
In three different steps of aerobic respiration of pyruvic acid, $C O_{2}$ is released. Those steps are:
During acetyl Co-A formation.
During formation of alpha-ketoglutaric acid in Krebs cycle.
During succinic acid formation in Krebs cycle.

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