Starting with citrate, which of the following combinations of products would result from three acetyl CoA molecules entering the citric acid cycle (see Figure 7.1)?
A) 1 ATP, 2 CO2, 3 NADH, and 1 FADH2
B) 2 ATP, 2 CO2, 3 NADH, and 3 FADH2
C) 3 ATP, 3 CO2, 3 NADH, and 3 FADH2
D) 3 ATP, 6 CO2, 9 NADH, and 3 FADH2
E) 38 ATP, 6 CO2, 3 NADH, and 12 FADH2

Question

Quizplus · Accepted Answer

Each acetyl CoA entering the citric acid cycle results in the production of 1 ATP, 2 CO2, 3 NADH, and 1 FADH2. Therefore, three acetyl CoA molecules entering the cycle would result in the production of 3 ATP, 6 CO2, 9 NADH, and 3 FADH2. Option D is the only one that matches this combination. Option A is incorrect because it only includes 1 ATP, while option B includes too many FADH2 molecules. Option C is incorrect because it includes too many ATP molecules, and option E is incorrect because it includes too few CO2 molecules.

Starting with Citrate, Which of the Following Combinations of Products