Question

Explain why the NADH in glycolysis can only contribute 2 ATP in eukaryotic cellular respiration instead of 3.

Answer 1

Answer:

Although four ATP molecules are produced in the second half, the net gain of glycolysis is only two ATP because two ATP molecules are used in the first half of glycolysis.

Answer 2

Explanation:

NADH obtained in glycolysis give ATP during electron transport chain. In electron transport chain with the electron transport, proton is pumped out in intermembrane space of mitochondria by diff complex. This create a gradient and proton on outside move through ATP synthase complex and produce ATP by attaching a pi +ADP. From this calculation it is obtained 1 NADH =2.5 ATP. But for convince for calculation some use 1 NADH =3 ATP.