A student measures the effect of temperature on photosynthesis. Light intensity and carbon dioxide concentration are kept constant.
The table shows the results.
Table
| Temperature in ∘C^\circ\text{C}∘C | Mean gas volume in cm3\text{cm}^3cm3 per minute |
|---|---|
| 10 | 0.5 |
| 20 | 1.1 |
| 30 | 1.8 |
| 40 | 1.2 |
| 60 | 0.1 |
What is the percentage decrease in rate from the highest measured rate to the rate at 60 ∘C60\,^\circ\text{C}60∘C, to one decimal place?
55.6%55.6\%55.6%
170.0%170.0\%170.0%
94.4%94.4\%94.4%
5.6%5.6\%5.6%
44 exam-style questions on Edexcel GCSE Biology 6.1 Photosynthesis, covering 6.1.1 Photosynthetic organisms as producers, 6.1.2a Limiting factors on the rate of photosynthesis, 6.1.2b Interactions of limiting factors on photosynthesis, and 6.1.3 Inverse square law and light intensity. Each one has a worked solution and a mark scheme showing where the marks go.