A student measured the mass of product formed during an enzyme-controlled reaction.
The Table shows the results.
Table
| Time in min | Total mass of product formed in mg |
|---|---|
| 0 | 0 |
| 1 | 5 |
| 2 | 10 |
| 3 | 15 |
| 4 | 20 |
| 6 | 23 |
| 8 | 24 |
| 10 | 24 |
Calculate the mean rate of product formation during the first 4 minutes. Give your answer in mg/min\text{mg/min}mg/min.
Explain why the total mass of product does not increase after 8 minutes.
The student repeated the investigation using twice the concentration of enzyme. All other variables were kept the same.
Describe how the results would be different.
44 exam-style questions on Edexcel GCSE Biology 1.3 Enzymes, covering 1.3.1 Mechanism of enzyme action, 1.3.2 Denaturation of enzymes, 1.3.3 Factors affecting enzyme activity, and 1.3.4 Measuring energy in food by calorimetry. Each one has a worked solution and a mark scheme showing where the marks go.