Anaerobic respiration in yeast yields ethanol and CO2

Steps:

• Identify anaerobic respiration as glucose breakdown without oxygen.
• Recall yeast performs alcoholic fermentation, producing ethanol and carbon dioxide.
• Compare choices to the reaction: glucose → ethanol + CO2.
• Select the matching equation.

Why D is correct:

• Matches the formula for alcoholic fermentation: C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂.

Why the others are wrong:

• A: Includes lactic acid, a product of bacterial or animal fermentation, not yeast.
• B: Produces only lactic acid, typical of animal muscle cells, not yeast.
• C: Features lactic acid and CO₂, incorrect for yeast's ethanol pathway.

Final answer: D