CAIE IGCSE Biology 21.2.1 Role of Anaerobic Respiration in Yeast Questions

Practise explaining how yeast respires anaerobically to produce ethanol for biofuel, and distinguish this product from carbon dioxide used in bread-making.

Exam points

Describe anaerobic respiration by yeast and identify ethanol as the biofuel product.

[Maximum number: 2]

Some countries have invested in biofuels such as ethanol, biomass and biodiesel.

Describe how ethanol can be made by microorganisms.

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CAIE IGCSE Biology 21.2.1 Role of Anaerobic Respiration in Yeast Questions question 1