Where in the process of extracting energy from glucose is the nadh oxidized by complex i formed?

It occurs during the continuous glyceraldehyde-3-phosphate phosphorilation.

Explanation:

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First of all, the process of extracting energy from glucose is called glycolysis. Then, the NADH oxidation happens during the glycolysis' sixth step when the glyceraldehyde-3-phosphate is phosphorilated by the addition of another phosphate group due to the electron carrier NAD+ which produces NADH. In fact, that is not the requested oxidation but it occurs when this process becomes continuous as long as the NADH is oxidized back to NAD+ to keep on the process.

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