AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
When pyruvate is broken down in yeast during fermentation (anaerobic respiration), the products formed are ethanol and carbon dioxide.
Source: Chapter 5, Section 5.3 Respiration
The passage explicitly states: "the pyruvate may be converted into ethanol and carbon dioxide. This process takes place in yeast during fermentation." Both products must be named for full marks. Do not confuse this with aerobic respiration (CO₂ + water) or lactic acid fermentation (in muscles).