O-LevelBiologyPlant Nutrition5090/11 · May/June 2021 · Q51 Mark
An investigation was carried out into the effects of light intensity and carbon dioxide concentration on the rate of photosynthesis. Which graph shows the results of this investigation? [Figure 3.1]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
ARate of photosynthesis vs light intensity graph with three lines (high, intermediate, low CO2 concentration) all increasing then plateauing, high CO2 highest.
BRate of photosynthesis vs light intensity graph with high CO2 line increasing then decreasing.
CRate of photosynthesis vs light intensity graph with all three lines decreasing.
DLight intensity vs rate of photosynthesis graph with three lines all increasing then plateauing.
✓ Correct answer
A: Rate of photosynthesis vs light intensity graph with three lines (high, intermediate, low CO2 concentration) all increasing then plateauing, high CO2 highest.
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