Which process makes the most efficient use of the energy in glucose during cellular respiration?

• A. Aerobic respiration
• B. Photosynthesis
• C. Anaerobic respiration
• D. Fermentation

Answer: (A)

Verified step by step guidance

1. Understand that cellular respiration is the process by which cells convert glucose into energy. It can occur in the presence or absence of oxygen.
2. Identify the types of cellular respiration: aerobic respiration (with oxygen) and anaerobic respiration (without oxygen). Fermentation is a type of anaerobic process.
3. Recall that aerobic respiration occurs in the mitochondria and involves glycolysis, the Krebs cycle, and the electron transport chain, producing up to 36-38 ATP molecules per glucose molecule.
4. Compare this with anaerobic respiration and fermentation, which occur in the cytoplasm and produce only 2 ATP molecules per glucose molecule.
5. Conclude that aerobic respiration is the most efficient process for energy extraction from glucose, as it yields the highest amount of ATP.