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

The citric acid cycle, also known as the Krebs cycle, produces 2 moles of CO₂ per mole of pyruvate, which is the end product of glycolysis. Since each glucose molecule undergoes two rounds of the citric acid cycle (one for each pyruvate produced by glycolysis), the total number of moles of CO₂ released per mole of glucose oxidized is 4. Therefore, the correct answer is B.

Use the Following Information to Answer the Question Below