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.

---

Definitions:

Central Line

A catheter placed in a large vein, typically in the neck, chest, or groin, to deliver medications, fluids, or to obtain blood tests directly into the bloodstream.

Chemotherapy

A type of cancer treatment using drugs designed to kill or slow the growth of cancer cells.

Jejunostomy Feedings

Nutritional support delivered directly into the jejunum (part of the small intestine) via a surgically created opening.

Gelatin

A colorless and tasteless substance derived from collagen used in food preparation and pharmaceuticals.