Refer to Figure 9

question 20

Multiple Choice

Refer to Figure 9.2, showing the citric acid cycle, as a guide to answer the following questions.

-During oxidative phosphorylation, H₂O is formed. Where does the oxygen for the synthesis of the water come from?

• A)carbon dioxide (CO₂)
• B)glucose (C₆H₁₂O₆)
• C)molecular oxygen (O₂)
• D)pyruvate (C₃H₃O₃⁻)
• E)lactate (C₃H₅O₃⁻)

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