BI-2052
Factors affecting photosynthesis
Biology · Secondary 4 · Hard · Factors affecting photosynthesis
A plant is kept at a constant light intensity and carbon dioxide concentration. Its rate of photosynthesis increases as temperature rises from 10 °C to 30 °C, but decreases when the temperature is raised further to 45 °C.
Which statement explains the decrease above 30 °C?
Which statement explains the decrease above 30 °C?
- Enzymes controlling photosynthesis become denatured at high temperatures.
- Chlorophyll is produced more slowly at higher temperatures.
- Light intensity decreases automatically when temperature increases.
- Carbon dioxide stops diffusing into the leaf at higher temperatures.
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