What is the by-product of anaerobic respiration in muscle tissue?
  1. Lactic acid
  2. Nitrogen
  3. Oxygen
  4. Carbon dioxide
  5. Glycogen
Explanation
Answer: A, lactic acid. In anaerobic respiration, pyruvate is ultimately converted to lactic acid.

Key Takeaway: Anaerobic respiration provides an avenue for organisms to produce energy in the absence of oxygen. Conversely, aerobic respiration requires oxygen.
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