Glycolysis produces four molecules of ATP from each molecule of fructose-1,6-bisphosphate because
A) two molecules of ATP are required to convert glucose to fructose-1,6-bisphosphate.
B) fructose-1,6-bisphosphate is converted into two molecules of 1,3-bisphosphoglycerate, each of which produces two ATPs when metabolized to pyruvate.
C) fructose-1,6-bisphosphate is converted into four molecules of 1,3-bisphosphoglycerate, each of which produces one ATP when metabolized to pyruvate.
D) Both a and b

Question

Quizplus · Accepted Answer

Fructose-1,6-bisphosphate is converted into two molecules of 1,3-bisphosphoglycerate, which each produce two ATPs when metabolized to pyruvate, resulting in a total of four ATPs from one molecule of fructose-1,6-bisphosphate. Therefore, option B is the correct choice. Option A is incorrect because although two ATP molecules are consumed during the initial stages of glycolysis, these are not directly involved in the ATP production from fructose-1,6-bisphosphate. Option C is incorrect as it incorrectly states that fructose-1,6-bisphosphate is converted into four molecules of 1,3-bisphosphoglycerate when in fact it is converted into two molecules.

Glycolysis Produces Four Molecules of ATP from Each Molecule of Fructose-1,6-Bisphosphate