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Questions  

What is the net gain of ATP molecules for the complete aerobic breakdown of a molecule of glucose?

a
40
b
34
c
36
d
38

detailed solution

Correct option is D

During aerobic breakdown of a molecule of Glucose, the number of ATP formed in various stages of respiration is Glycolsis : Formation : 4 ATP                Usage : 2 ATP               Net gain : 2 ATPKrebs cycle : 2 ATPOxidative phosphorylation due to electron transport system : 34 ATP (oxidation of 10 NADH and 2 FADH2)Net gain = 2 ATP  +   2 ATP + 34 ATP = 38 ATP

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