Question

Glycolysis produces four ATP molecules, and the Krebs cycle produces six ATP molecules. How many ATP molecules are produced by the electron transport chain?

A. 18

B. 34

C. 2

D. 10

Answer 1

Glycolysis produces 2 ATP molecules, and the Krebs cycle produces 2 more. Electron transport begins with several molecules of NADH and FADH2 from the Krebs cycle and transfers their energy into as many as 34 more ATP molecules.

So the Answer is B. :)