There Is a Cyclic Reaction in Which Pyruvate Becomes Oxaloacetate

question 70

Multiple Choice

There is a cyclic reaction in which pyruvate becomes oxaloacetate. The oxaloacetate is converted to malate and then back to pyruvate. This cycle is important because:

• A) There is no net use or fixation of CO₂ in this cycle.
• B) NADH is converted to NADPH in this cycle.
• C) There is no net oxidation or reduction in this cycle.
• D) NADPH is converted to NADH in this cycle.
• E) This is actually a wasteful pathway with no practical use.

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