Two hornwort shoots are illuminated under the same conditions. The oxygen collected from each shoot is recorded.
| Shoot | Length in cm | Volume of oxygen collected in cm3\text{cm}^3cm3 | Time in minutes |
|---|---|---|---|
| R | 6 | 0.36 | 3 |
| S | 10 | 0.50 | 5 |
Which statement gives the correctly calculated oxygen production rates per minute per centimetre of shoot for R and S?
R: 0.120 cm3 min−1 cm−10.120\,\text{cm}^3\,\text{min}^{-1}\,\text{cm}^{-1}0.120cm3min−1cm−1; S: 0.100 cm3 min−1 cm−10.100\,\text{cm}^3\,\text{min}^{-1}\,\text{cm}^{-1}0.100cm3min−1cm−1.
R: 0.720 cm3 min−1 cm−10.720\,\text{cm}^3\,\text{min}^{-1}\,\text{cm}^{-1}0.720cm3min−1cm−1; S: 1.000 cm3 min−1 cm−11.000\,\text{cm}^3\,\text{min}^{-1}\,\text{cm}^{-1}1.000cm3min−1cm−1.
R: 0.020 cm3 min−1 cm−10.020\,\text{cm}^3\,\text{min}^{-1}\,\text{cm}^{-1}0.020cm3min−1cm−1; S: 0.010 cm3 min−1 cm−10.010\,\text{cm}^3\,\text{min}^{-1}\,\text{cm}^{-1}0.010cm3min−1cm−1.
R: 0.060 cm3 min−1 cm−10.060\,\text{cm}^3\,\text{min}^{-1}\,\text{cm}^{-1}0.060cm3min−1cm−1; S: 0.050 cm3 min−1 cm−10.050\,\text{cm}^3\,\text{min}^{-1}\,\text{cm}^{-1}0.050cm3min−1cm−1.
87 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.