CAIE IGCSE Biology 21.2.1 Yeast Respiration for Ethanol Biofuel
Practise describing how anaerobic respiration in yeast produces ethanol that can be used as a biofuel.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- state that yeast produces ethanol when it respires anaerobically without oxygen
- identify ethanol rather than carbon dioxide as the yeast product used for biofuel
- distinguish biofuel production from bread-making and unrelated enzyme applications
21.2.1—Role of anaerobic respiration in yeast question 1
[Maximum number: 2]
Some countries have invested in biofuels such as ethanol, biomass and biodiesel.
Describe how ethanol can be made by microorganisms.
by yeast ;
(using) anaerobic respiration ;
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