The free energy for the oxidation of glucose to CO^2 and water is -686kcal/mol a

Question

The free energy for the oxidation of glucose to CO^2 and water is -686kcal/mol and the free energy for the reduction of NAD+ to NADH is +53 kcal/mol. Why are only two molecules of NADH formed during glycolysis when it appears that as many as a dozen could be formed?
A) There is no CO^2 or water produced during glycolysis
B) Most of the free energy available from the oxidation of glucose is used in the production of ATP in glycolysis
C) Most of the free energy available from the oxidation of glucose remains in pyruvate, one of the products in glycolysis
D)Glycolysis is a very inefficient reaction, with much of the energy of glucose released as heat
E) Glycolysis consists of many enzymatic reactions, each of which extracts some energy from glucose molecules

Explanation / Answer

Most of the free energy available from the oxidation of glucose remains in pyruvate, one of the products in glycolysis. This is the answer! Ignore my bad letter matching skills.

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