Which of the following is correct?
A) Most of the ATP are produced by substrate-level phosphorylation.
B) Glycolysis relies on substrate-level oxidation for the four ATP produced in this pathway.
C) Each FADH2 yields about 1.5 ATP via oxidative phosphorylation.
D) Most ATP from cellular respiration are produced directly in the citric acid (Krebs) cycle.

Question

Quizplus · Accepted Answer

Each FADH2 yields about 1.5 ATP via oxidative phosphorylation. This is because during the electron transport chain, FADH2 enters at a lower energy state than NADH and produces less ATP through the electron transport chain. Specifically, FADH2 produces 1.5 ATP, while NADH produces about 2.5 ATP. So, option A and D are incorrect as they mention "most" of the ATP, which is not true. Option B is incorrect as glycolysis relies on substrate-level phosphorylation, not substrate-level oxidation.

Which of the Following Is Correct