plumiAnaerobic respiration: Edexcel A‑Level Biology B questions
Every Edexcel A-Level Biology B exam question on 5.5 Anaerobic respiration, 2016–2025, with its mark scheme and examiner’s report.
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Calculations
Q4(a)(i)
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Q4(a)(ii)
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Q10(a)(i)
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Q10(a)(ii)
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Q10(c)(i)
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Q10(c)(ii)
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Q10(a)
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Q10(b)
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Q10(c)(i)
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Q8(b)(ii)
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Q9(d)
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Q7(b)(ii)
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Q1(b)(i)
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Q1(b)(ii)
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Q1(b)(iii)
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Q8(c)
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Q11(c)(i)
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Q5(d)
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Q7(d)
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Q5(b)
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All 20 questions on Anaerobic respiration, as a list
- June 2024, Paper 3, Q4(a)(i) (5 marks): Describe how you could measure the respiration rate of woodlice collected from a garden. (5)
- June 2024, Paper 3, Q4(a)(ii) (2 marks): Identify one safety issue and one ethical issue involved in your method in part (a)(i) and state how you would minimise the effect of these. (2) Safety issue Et
- June 2024, Paper 3, Q10(a)(i) (1 mark): Calculate the initial rate of respiration of yeast with sucrose. (1) Answer cm3 min–1
- June 2024, Paper 3, Q10(a)(ii) (3 marks): Explain the results for sucrose compared with lactose without lactase. (3)
- June 2024, Paper 3, Q10(c)(i) (1 mark): Sketch a line on this graph to show the expected results for a suspension containing 3.5 g of yeast. (1)
- June 2024, Paper 3, Q10(c)(ii) (3 marks): Explain the effect of the concentration of yeast on the volume of carbon dioxide produced in this investigation. (3)
- June 2023, Paper 3, Q10(a) (2 marks): The rate of aerobic respiration was determined as the oxygen uptake calculated in mm3 per minute per gram. State the two additional measurements that you would
- June 2023, Paper 3, Q10(b) (2 marks): Justify two improvements that would ensure the validity of this investigation. (2)
- June 2023, Paper 3, Q10(c)(i) (1 mark): For enzyme‑controlled reactions, a 10°C rise in temperature will double the rate of reaction. Predict the mean rate of oxygen uptake if the water bath had been
- June 2022, Paper 1, Q8(b)(ii) (4 marks): Explain why cells need to respond to hypoxia with an increase in the rate of glycolysis. (4)
- November 2021, Paper 1, Q9(d) (3 marks): The graph shows the changes in the lactic acid concentration in the muscles and blood of a Weddell seal, after a prolonged dive. 100 muscles 80 60 Concentration
- October 2020, Paper 1, Q7(b)(ii) (3 marks): Explain why lipids can be respired only in aerobic conditions. (3)
- October 2020, Paper 3, Q1(b)(i) (1 mark): Give the units for a valid comparison of the rate of respiration of these two species of insect. (1)
- October 2020, Paper 3, Q1(b)(ii) (2 marks): Other factors may affect the results from this respirometer. Describe how one named factor could be controlled when using this respirometer. (2)
- October 2020, Paper 3, Q1(b)(iii) (2 marks): Explain why the soda lime in the tube must be replaced when the other species of insect is placed in the respirometer. (2)
- June 2019, Paper 3, Q8(c) (4 marks): The diagram shows a respirometer. glass tube glass container syringe wire grid Explain how a student could modify this respirometer and use it to measure the me
- June 2019, Paper 3, Q11(c)(i) (3 marks): Human activity can cause pollution that reduces the oxygen concentration in water. Explain why a low oxygen concentration in the water would lower the pH of the
- June 2018, Paper 3, Q5(d) (4 marks): Waterlogged soil lacks oxygen. Explain why a lack of oxygen in waterlogged soil could reduce the growth of a plant. (4)
- June 2017, Paper 1, Q7(d) (3 marks): Some people with Leigh syndrome have mutations that affect proteins involved in the electron transport chain. Explain why these mutations lead to a build-up of
- June 2017, Paper 3, Q5(b) (9 marks): The diagram shows some apparatus that can be used to measure the rate of respiration in small animals such as woodlice. 3 way tap glass tube woodlice potassium
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