Question

Which of the following statements best describes the role of NAD+/NADH in glycolysis?

A) NADH is used to produce energy by directly creating the phosphoanhydride bonds in ATP.
B) NAD+ is used to carry electrons.
C) NADH is capable of pumping ions during glycolysis.
D) NADH is used primarily in substrate-level phosphorylation.
E) all of the above

Answer 1

The role of NAD+/NADH in glycolysis is to carry electrons, which are used to produce ATP in later stages of cellular respiration.

Step-by-step explanation:

The role of NAD+/NADH in glycolysis is to carry electrons. During the second phase of glycolysis, glyceraldehyde-3-phosphate dehydrogenase converts each three-carbon glyceraldehyde-3-phosphate molecule into 1,3-bisphosphoglycerate, which releases an electron that is picked up by NAD+ to create NADH. NADH is a high-energy molecule that carries the electrons to be used in later stages of cellular respiration to produce ATP. Therefore, the best statement that describes the role of NAD+/NADH in glycolysis is:

B) NAD+ is used to carry electrons.