Use the following information to answer the question below.

The citric acid cycle.
For each mole of glucose (C₆H₁₂O₆) oxidized by cellular respiration, how many moles of CO₂ are released in the citric acid cycle (see the accompanying figure)?
A) 2
B) 4
C) 6
D) 32

Question

Use the following information to answer the question below.

The citric acid cycle.
For each mole of glucose (C₆H₁₂O₆) oxidized by cellular respiration, how many moles of CO₂ are released in the citric acid cycle (see the accompanying figure)?
A) 2 
B) 4 
C) 6 
D) 32

Quizplus · Accepted Answer

In the citric acid cycle, each mole of glucose produces 2 moles of pyruvate which enters the cycle. Each pyruvate is oxidized to produce 3 CO₂ molecules. Therefore, each mole of glucose oxidized in the citric acid cycle produces a total of 6 CO₂ molecules (3 from each pyruvate). So the correct answer is B) 4.

Use the Following Information to Answer the Question Below