plumiLactate after anaerobic respiration: Edexcel International A Level Biology questions
Edexcel International A Level Biology past-paper questions on 7.1.5 Lactate after anaerobic respiration, 2019–2025, with mark schemes and examiner’s reports where available.
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Q1(c)
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All 13 questions on Lactate after anaerobic respiration, as a list
- June 2025, Unit 6, Q1(c) (3 marks): Describe how ATP and reduced co‑enzyme are produced in anaerobic respiration. (3)
- October 2024, Unit 5, Q3(c)(i) (2 marks): Explain the effect on the lactate concentration from 15 minutes to 60 minutes on the graph. (2)
- October 2024, Unit 5, Q3(c)(ii) (1 mark): State one reason why the lactate concentration was measured 15 minutes before starting the exercise. (1)
- October 2024, Unit 5, Q3(c)(iii) (1 mark): State one variable that would need to be controlled in this investigation and how this would be achieved. (1)
- June 2024, Unit 5, Q6(a)(i) (1 mark): The diagram shows what happens to the lactate following exercise. Molecule W Molecule Y Lactate Molecule Z Which row shows the molecules in this diagram? (1) Mo
- June 2024, Unit 5, Q6(a)(ii) (6 marks): The table and graph show some of the results of this investigation. Lactate concentration in blood / mmol dm–3 Intensity of exercise / a.u. Athlete Non-athlete
- January 2024, Unit 5, Q6(a)(ii) (3 marks): During a sprint race, leg muscles produce lactate. Describe what happens to the lactate at the end of the race. (3)
- January 2023, Unit 5, Q6(d)(iii) (2 marks): Anaerobic respiration produces lactate. Describe what happens to this lactate. (2)
- October 2022, Unit 5, Q1(a)(ii) (1 mark): Anaerobic respiration produces lactate as a waste product. Which is the result of lactate production? (1) A blood becomes less acidic B muscle becomes less fati
- October 2022, Unit 5, Q4(b)(ii) (2 marks): Suggest why a cheetah can maintain this heart rate and speed for only a short period of time. (2)
- January 2022, Unit 5, Q2(c) (3 marks): In an investigation, an athlete ran for 10 minutes on a running machine moving at constant speed. The investigation was repeated at seven running speeds. At eac
- October 2021, Unit 5, Q5(c) (6 marks): The photograph shows a crocodile (Crocodylus porosus) that lives in saltwater habitats. (Source: © Danny Ye/Shutterstock) An investigation measured the lactate
- October 2020, Unit 5, Q1(a)(ii) (1 mark): What happens to the lactate concentration during a period of anaerobic respiration? (1) A decreases, causing a decrease in blood pH B decreases, causing an incr
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