plumiFactors affecting the rate of photosynthesis: Edexcel International A Level Biology questions
Edexcel International A Level Biology past-paper questions on 5.1.5 Factors affecting the rate of photosynthesis, 2019–2025, with mark schemes and examiner’s reports where available.
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Q9(b)(i)
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All 21 questions on Factors affecting the rate of photosynthesis, as a list
- October 2024, Unit 4, Q9(b)(i) (1 mark): Which would have been the most appropriate light to use as a positive control? (1) A green B mixture of green, blue and red light C ultraviolet D sunlight
- October 2024, Unit 4, Q9(b)(ii) (4 marks): The graphs show the results for the mean rate of photosynthesis and mean leaf biomass. 4 3 Mean rate of photosynthesis 2 / a.u. 1 0 control blue amber red Light
- October 2024, Unit 6, Q4(a) (2 marks): Describe the preliminary practical work that you might undertake to ensure your proposed method would provide quantitative results. (2)
- October 2024, Unit 6, Q4(b) (9 marks): Devise a detailed method, including how you would control and monitor important variables. (9)
- June 2024, Unit 4, Q7(b)(i) (2 marks): Explain why air temperature affects the CO2 fertilisation effect. (2)
- June 2024, Unit 4, Q7(b)(ii) (2 marks): Suggest why soil temperature affects the CO2 fertilisation effect. (2)
- June 2024, Unit 4, Q7(c) (3 marks): Explain why a lack of water availability in the leaves would decrease the CO2 fertilisation effect. (3)
- January 2024, Unit 4, Q2(b)(i) (3 marks): Describe three conclusions that can be made about the differences in the effect of temperature on the rate of photosynthesis in these two types of plant. (3)
- October 2023, Unit 6, Q4(a) (2 marks): Describe preliminary practical work that you might undertake to ensure your proposed method would provide quantitative results. (2)
- October 2023, Unit 6, Q4(b) (9 marks): Devise a detailed method, including how you would control and monitor important variables. (9)
- October 2023, Unit 6, Q4(d) (2 marks): Suggest two limitations of your proposed method. (2)
- June 2023, Unit 4, Q5(a)(i) (3 marks): Calculate the rate of production of oxygen at 1 200 seconds for C. pyrenoidosa with PBF attached. (3) Answer nmol secs–1
- October 2022, Unit 4, Q9(d) (6 marks): Forests, shrublands and grasslands are three types of ecosystem. Biotic and abiotic factors affect how much biomass is stored in the roots of plants. The graphs
- October 2022, Unit 6, Q1(a) (5 marks): Describe an experiment to investigate the effect of temperature on the rate of photosynthesis in Cabomba caroliniana. (5)
- January 2022, Unit 4, Q6(b)(i) (1 mark): Which could be the units for rate of photosynthesis? (1) A mg CO2 produced mm–2 hr–1 B mg CO2 produced mm–1 hr–2 C mg CO2 used mm–2 hr–1 D mg CO2 used mm–1 hr–2
- January 2022, Unit 4, Q6(b)(ii) (3 marks): Compare and contrast the rate of photosynthesis of these two species of plant, at different temperatures. (3)
- January 2022, Unit 4, Q6(b)(iv) (3 marks): The graph shows the maximum temperature, for each month, in two regions of North America: Wheatland and Pole Mountain. 35 30 25 Maximum 20 temperature / °C 15 1
- October 2021, Unit 6, Q1(a) (5 marks): Describe an experiment to investigate the effect of different wavelengths of light on the rate of photosynthesis in Elodea canadensis. (5)
- October 2020, Unit 6, Q3(b) (3 marks): Describe the preliminary practical work that you might undertake to ensure your proposed method would provide meaningful data. . (3)
- October 2020, Unit 6, Q3(c) (10 marks): Devise a detailed method, including an explanation of how you would control and monitor important variables. (10)
- October 2020, Unit 6, Q3(e) (3 marks): Suggest three limitations of your proposed method. (3) 1 2 3
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