Consider the contribution of NADH and FADH₂. How many of the 38 total ATP molecules produced in cellular respiration come from the citric acid cycle?

Question

Quizplus · Accepted Answer

In the citric acid cycle, 6 NADH and 2 FADH2 are produced per glucose molecule. Each NADH contributes approximately 2.5 ATP and each FADH2 contributes about 1.5 ATP in the electron transport chain, totaling 15 ATP from NADH and 3 ATP from FADH2, which sums up to 18 ATP. Additionally, 2 ATP (or GTP) are directly produced in the citric acid cycle, making a total of 20 ATP from the citric acid cycle. However, the question asks for the total ATP from the citric acid cycle, including the electron transport chain, which is 22 ATP.

Consider the Contribution of NADH and FADH2

Consider the Contribution of NADH and FADH₂