There Is a Cyclic Reaction in Which Pyruvate Becomes Oxaloacetate

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.