Use the following information to answer the question below.

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

Question

Use the following information to answer the question below.

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

Quizplus · Accepted Answer

Three acetyl CoA molecules entering the citric acid cycle results in the production of 6 CO₂, 9 NADH, 3 FADH₂, and 1 ATP (per cycle, with two cycles needed to fully process the three acetyl CoA molecules). Thus, the correct combination of products is 3 ATP, 6 CO₂, 9 NADH, and 3 FADH₂. Therefore, choice C is the best answer.

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