A researcher keeps a culture of microscopic algae in a sealed transparent chamber. A sensor shows that the carbon dioxide concentration is falling steadily while the algae are in low light.
The algae have enough carbon dioxide, and the temperature is kept constant. The researcher increases the light intensity.
Which observation is most likely during the next minute?
The carbon dioxide concentration falls at a faster rate.
The carbon dioxide concentration falls at a slower rate.
The carbon dioxide concentration continues to fall at the same rate.
The carbon dioxide concentration stops falling and starts to rise.
117 exam-style questions on OCR GCSE Biology 1.4 Photosynthesis, covering 1.4.1 Photosynthesisers as biomass producers, 1.4.2 Factors affecting the rate of photosynthesis, and 1.4.3 Limiting factors in photosynthesis. Each one has a worked solution and a mark scheme showing where the marks go.