What are glycolysis, the TCA cycle, and oxidative phosphorylation and their roles in energy production?

• A. Glycolysis occurs in the nucleus and produces ATP directly.
• B. Glycolysis breaks glucose to pyruvate; pyruvate converts to acetyl-CoA, enters the TCA cycle generating NADH and FADH2; oxidative phosphorylation uses electrons to produce ATP.
• C. They are all anaerobic processes that do not produce ATP.
• D. They convert fatty acids directly into glucose.

Answer: (B)