What is a disadvantage of anaerobic respiration compared to aerobic respiration?

• A. It produces less ATP per glucose molecule.
• B. It requires oxygen to occur.
• C. It is faster than aerobic respiration.
• D. It generates more carbon dioxide.

Answer: (A)

Verified step by step guidance

1. Understand the basic definitions: Anaerobic respiration occurs without oxygen, while aerobic respiration requires oxygen.
2. Compare ATP production: Aerobic respiration produces more ATP per glucose molecule than anaerobic respiration. This is because aerobic respiration fully oxidizes glucose, while anaerobic respiration does not.
3. Consider the speed of the processes: Anaerobic respiration is generally faster than aerobic respiration because it involves fewer steps and does not require oxygen transport.
4. Evaluate carbon dioxide production: Aerobic respiration produces more carbon dioxide as a byproduct because it fully oxidizes glucose, whereas anaerobic respiration produces less or different byproducts like lactic acid or ethanol.
5. Identify the disadvantage: The main disadvantage of anaerobic respiration compared to aerobic respiration is that it produces less ATP per glucose molecule, making it less efficient in terms of energy yield.