How many ATP molecules are formed in ETS from the reduced nicotinamide adenine dinucleotide generated in two rounds of Krebs cycle?

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Solution

The correct option is D 18
One Krebs cycle results in the production of 3 $N A D H_{2}$ . So, at the end of two cycles, 6 $N A D H_{2}$ are produced. One molecule of $N A D H_{2}$ produces 3 ATP which means 18 ATP are produced from 6 $N A D H_{2}$ molecules.

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