Question

Number of NADH produced during breakdown of one molecule of glucose to 1 : 3 diphosphoglycerate stage is

• A. 6
• B. 4
• C. 3
• D. 2

Answer 1

The correct option is D 2

One molecule of glucose forms two molecules of pyruvic acid as the end product of glycolysis. At the 6${}^{th}$ step of glycolysis, 2 molecules of 1,3 diphosphoglyceraldehyde converts to 2 molecules of 1,3 diphosphoglyceric acid by converting 2 NAD+ to 2 NADH${}_2$. So, 2 molecules of NADH${}_2$ are produced which yields 6 ATP through ETS during aerobic respiration.

So the answer is '2'.