Contrast lactic acid fermentation and alcoholic fermentation in terms of organisms and end products.

• A. Lactic acid fermentation occurs in yeast; alcoholic fermentation occurs in humans.
• B. Lactic acid fermentation requires oxygen; alcoholic fermentation requires oxygen.
• C. Lactic acid fermentation produces ethanol; alcoholic fermentation produces lactate.
• D. Lactic acid fermentation (humans, muscle) produces lactate; alcoholic fermentation (yeast, some bacteria) produces ethanol and CO2.

Answer: (D)