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Question

Number of ATP molecules which can be built on complete oxidation of pyruvic acid is

A
6
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B
2
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C
15
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D
30
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Solution

The correct option is C 15
The breakdown glucose takes place during glycolysis in which there is a net gain of 8 ATP. The pyruvic acid so formed undergoes oxidative decarboxylation and thus forms acetyl CoA. This reaction leads in the formation of 2 NADH₂ molecules. It results in the formation of 6 ATP.
Therefore if the complete oxidation of pyruvic acid takes place when there is a net gain of 15 ATP.
So, the correct option is '15ATP'

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