Which of these is a product of anaerobic respiration?

• A. Carbon dioxide
• B. Water
• C. Oxygen
• D. Lactic acid

Answer: (D)

Verified step by step guidance

1. Understand that anaerobic respiration is a type of respiration that occurs without oxygen. It is used by some organisms and cells when oxygen is scarce.
2. Recognize that in anaerobic respiration, glucose is partially broken down to release energy. This process is less efficient than aerobic respiration, which uses oxygen.
3. Identify the common products of anaerobic respiration. In muscle cells, the process results in the production of lactic acid. In yeast and some bacteria, it results in ethanol and carbon dioxide.
4. Note that lactic acid is specifically produced in animal cells, including human muscle cells, during anaerobic respiration when oxygen is not available.
5. Conclude that among the given options, lactic acid is the correct product of anaerobic respiration in muscle cells, as opposed to carbon dioxide, water, or oxygen.