During the commercial production of beer, yeast cells ferment sugars under anaerobic conditions.
Write the word equation for anaerobic respiration in yeast cells.
Describe a chemical test, including the positive result, that can be used to identify the gas released during this fermentation process.
10 exam-style questions on Edexcel IGCSE Biology Respiration. Each one has a worked solution and a mark scheme showing where the marks go.