Two vessels contained the same glucose solution. Yeast was added to each vessel.
The table shows the results.
| Vessel | Mean dissolved oxygen concentration in the culture in mg/dm³ | Mass of ethanol produced in g | Mass of carbon dioxide produced in g |
|---|---|---|---|
| R | 6.4 | 0.0 | 11.6 |
| S | 0.0 | 9.2 | 8.8 |
Use the data to explain which vessel contained yeast carrying out fermentation.
Predict how the mass of glucose used by the yeast in the vessel you identified would compare with the mass used in the other vessel, if the yeast in both vessels transferred the same total amount of energy to ATP. Explain your prediction.
92 exam-style questions on AQA GCSE Biology 4.2 Respiration, covering 4.2.1 Aerobic and anaerobic respiration, 4.2.2 Response to exercise, and 4.2.3 Metabolism. Each one has a worked solution and a mark scheme showing where the marks go.