Q.

What is the yield of ATP for the complete oxidation of one molecule of acetyl CoA in Krebs cycle ?

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a

11

b

1

c

12

d

9

answer is A.

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Detailed Solution

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Acetyl CoA produces 3 NADH+H+, 1 FADH2 and 1 ATP directly by substrate level phosphorylation. 

1 NADH+H+ produce 3 ATP and 1 FADH2 produces 2 ATP. 

Therefore, total ATP produced by oxidative phosphorylation= (3x3)+(2x1)=11 ATP.

Total no. of ATP produced during complete oxidation of one molecule of acetyl CoA in Krebs cycle is 12 ATP.

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What is the yield of ATP for the complete oxidation of one molecule of acetyl CoA in Krebs cycle ?