2.20 Factors affecting the rate of photosynthesis
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Which factor is most likely to limit photosynthesis at dawn?
(1)Total for this question: 1 mark
2(e) NUTRITION · EXAM QUESTIONS
2.20 Factors affecting the rate of photosynthesis
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2.20 Factors affecting the rate of photosynthesis
Exam question
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Which factor would increase the rate of photosynthesis in a glasshouse on a bright, warm day?
(1)Total for this question: 1 mark
2.20 Factors affecting the rate of photosynthesis
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What happens to the rate of photosynthesis at very high temperatures?
(1)Total for this question: 1 mark
2.20 Factors affecting the rate of photosynthesis
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A piece of pondweed placed 10 cm from a lamp produced 84 bubbles in 4 minutes. Calculate the rate of photosynthesis in bubbles per minute.
(2)bubbles per minuteTotal for this question: 2 marks
2.20 Factors affecting the rate of photosynthesis
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A piece of pondweed placed 20 cm from a lamp produced 45 bubbles in 5 minutes. Calculate the rate of photosynthesis in bubbles per minute.
(2)bubbles per minuteTotal for this question: 2 marks
2.20 Factors affecting the rate of photosynthesis
Exam question
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A piece of pondweed placed 40 cm from a lamp produced 12 bubbles in 3 minutes. Calculate the rate of photosynthesis in bubbles per minute.
(2)bubbles per minuteTotal for this question: 2 marks
2.20 Factors affecting the rate of photosynthesis
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State what is meant by a limiting factor.
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Total for this question: 1 mark
2.20 Factors affecting the rate of photosynthesis
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Give three factors that can limit the rate of photosynthesis.
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Total for this question: 3 marks
2.20 Factors affecting the rate of photosynthesis
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Explain why increasing light intensity stops increasing the rate of photosynthesis above a certain point.
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Total for this question: 2 marks
2.20 Factors affecting the rate of photosynthesis
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Describe how the rate of photosynthesis changes as light gets brighter.
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Total for this question: 3 marks
2.20 Factors affecting the rate of photosynthesis
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Explain why increasing temperature increases the rate of photosynthesis only up to a point.
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Total for this question: 3 marks
2.20 Factors affecting the rate of photosynthesis
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Explain why growers add carbon dioxide to glasshouses.
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Total for this question: 3 marks
2.20 Factors affecting the rate of photosynthesis
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Suggest why paraffin heaters are used in glasshouses in winter.
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Total for this question: 2 marks
2.20 Factors affecting the rate of photosynthesis
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A grower considers using artificial lighting at night in a glasshouse. Evaluate this idea.
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Total for this question: 3 marks
2.20 Factors affecting the rate of photosynthesis
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Explain why the rate of photosynthesis is lower on a cold, bright day than on a warm, bright day.
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Total for this question: 2 marks