All of the following are products or intermediaries in glycolysis except

A) ATP.

B) NADH

C) FADH2.

D) pyruvate.

E) phosphoenolpyruvate.

The correct answer for this is C, because the Fadh2 is only involved at the redox reactions.

Explanation:

ATP is just a product from glycolysis. Remember that when you break the glucose, energy is been free as an ATP molecule. NADH2 is a substratum, you need it, to get NAD at the fermentation process in the cytoplasmic matrix. Pyruvate and phosphoenolpyruvate are also products at the glycolysis.