When yeast cells are O_{2} starved, fermentation serves as the source of energy. This results in the production of:
- A. ATP+CO_{2}+\text{Ethanol} ✓
- B. ATP+O_{2}+\text{Pyruvate}
- C. ATP+CO_{2}+\text{Lactic acid}
- D. ATP+O_{2}+\text{Acetaldehyde}
Correct Answer: A. ATP+CO_{2}+\text{Ethanol}
Explanation
Under anaerobic conditions (oxygen starvation), yeast undergoes alcoholic fermentation, converting pyruvate into ATP, carbon dioxide, and ethanol.
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