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Question

Number of ATP produced from one pyruvic acid during conversion to acetyl CoA is

A
3
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B
5
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C
8
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D
15
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Solution

The correct option is A 3
Pyruvic acid, the end product of glycolysis requires to undergo a link reaction to be able to enter Krebs' cycle as acetyl CoA, a 2 carbon compound. Pyruvic acid is acetylated by the pyruvate dehydrogenase complex which releases hydrogen and carbon dioxide. Hydrogen reduces one NAD+ to NADH2 per molecule of pyruvic acid. 1 NADH2 yields 3 ATP from ETS.
So, the correct answer is '3'.

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