Question

2 NADH $\left(H^{+}\right)$ produced during anaerobic glycolysis yield

• A. 6 ATP molecules
• B. 4 ATP molecules
• C. 8 ATP molecules
• D. None of the above

Answer 1

The correct option is D None of the above

The process of glycolysis yields 2 net ATPs and 2 NADH molecules. NADH is converted into ATP in mitochondrial electron transport chain if oxygen is present. In anaerobic respiration, there is no oxygen available so NADH does not lead to the formation of ATP molecules. Without oxygen, NADH builds up and the cell can run out of NAD. Without NAD glycolysis stops. To regenerate NAD, cells with anaerobic respiration carry out the process of fermentation in which NADH gets converted into NAD to restart glycolysis.

Thus, the correct answer is option D.