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Figure 16 shows the effect of light intensity and temperature on the rate of photosynthesis - Edexcel - GCSE Biology - Question 8 - 2018 - Paper 1
Question 8
Figure 16 shows the effect of light intensity and temperature on the rate of photosynthesis. (i) Describe the effect of light intensity on the rate of photosynthesi... show full transcript
Worked Solution & Example Answer:Figure 16 shows the effect of light intensity and temperature on the rate of photosynthesis - Edexcel - GCSE Biology - Question 8 - 2018 - Paper 1
Step 1
Describe the effect of light intensity on the rate of photosynthesis.
Answer
As light intensity increases, the rate of photosynthesis also increases, reflecting a direct relationship. This continues until light intensity reaches a certain level, after which it levels off. Beyond this point, another factor—such as carbon dioxide concentration or temperature—becomes limiting, causing the rate to stabilize.
Step 2
Explain the effect of temperature on the rate of photosynthesis.
Answer
Temperature affects the rate of photosynthesis by influencing enzyme activity. As temperature rises, the rate of photosynthesis increases up to an optimum level, as enzymes can catalyze more reactions. However, beyond this optimum temperature, enzymes may become denatured, leading to a decrease in the rate of photosynthesis.
Step 3