A student measures gases around living root cells supplied with enough oxygen. The table shows changes during the investigation.
Table
| Gas | Change in amount |
|---|---|
| oxygen | decreases |
| carbon dioxide | increases |
Which explanation accounts for both changes?
glucose reacts with oxygen and carbon dioxide is released
glucose reacts with carbon dioxide and oxygen is released
glucose forms ethanol and oxygen is released as a product
glucose forms lactic acid and carbon dioxide is released
98 exam-style questions on Edexcel GCSE Biology 8.3 Respiration, covering 8.3.1 Aerobic and anaerobic respiration. Each one has a worked solution and a mark scheme showing where the marks go.