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Aerobic respiration: Edexcel A‑Level Biology B questions

Every Edexcel A-Level Biology B exam question on 5.1 Aerobic respiration, 2016–2025, with its mark scheme and examiner’s report.

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1,826 questions

  1. Q2(b)

    June 2025 · Paper 1

    1 mark5.1 Aerobic respiration
    The whole paper ↗
    June 2025 Paper 1, question 2(b): Which row of the table shows the locations of glycolysis, the link reaction and the Krebs cycle in eukaryotic cells? (1) Glycolysis Link reaction Krebs cycle A

  2. Q2(c)(i)

    June 2025 · Paper 1

    2 marks5.1 Aerobic respiration
    The whole paper ↗
    June 2025 Paper 1, question 2(c)(i): The oxidation of one glucose molecule yields 2 870 224 Joules. The free energy stored in one ATP molecule is 30 566 Joules. Calculate the efficiency of energy t

  3. Q2(c)(ii)

    June 2025 · Paper 1

    1 mark5.1 Aerobic respiration
    The whole paper ↗
    June 2025 Paper 1, question 2(c)(ii): State why this process is not 100 % efficient. (1)

  4. Q7(c)(i)

    June 2024 · Paper 1

    2 marks5.1 Aerobic respiration
    The whole paper ↗
    June 2024 Paper 1, question 7(c)(i): Explain why well‑stocked bird feeders containing nuts were available throughout this investigation. (2)

  5. Q7(c)(ii)

    June 2024 · Paper 1

    6 marks5.1 Aerobic respiration
    The whole paper ↗
    June 2024 Paper 1, question 7(c)(ii): The graphs show the results of this investigation. Graph 1: volume of mitochondria Coal tit Blue tit Great tit Mean volume of mitochondria in red blood cells Se

  6. Q2(a)(ii)

    November 2021 · Paper 1

    2 marks5.1 Aerobic respiration
    The whole paper ↗
    November 2021 Paper 1, question 2(a)(ii): Explain the results for the yeast cultured with glucose and the yeast cultured with maltose. (2)

  7. Q5(b)(iii)

    November 2021 · Paper 1

    2 marks5.1 Aerobic respiration
    The whole paper ↗
    November 2021 Paper 1, question 5(b)(iii): Some scientists suggested that inhibiting both glycolysis and mitochondrial respiration may be an effective way of treating cancer cells. Explain why this sugge

  8. Q7(d)(i)

    October 2020 · Paper 1

    1 mark5.1 Aerobic respiration
    The whole paper ↗
    October 2020 Paper 1, question 7(d)(i): State why the RQ for carbohydrate is 1.0. (1)

  9. Q7(d)(ii)

    October 2020 · Paper 1

    2 marks5.1 Aerobic respiration
    The whole paper ↗
    October 2020 Paper 1, question 7(d)(ii): The table shows the formula for calculating the volume of oxygen used and the volume of carbon dioxide produced in the respiration of lipids. The number of carb

  10. Q7(e)

    October 2020 · Paper 1

    3 marks5.1 Aerobic respiration
    The whole paper ↗
    October 2020 Paper 1, question 7(e): Explain why an insect has an RQ of 1.0 at rest and an RQ of 0.7 during flight. (3)

  11. Q9(b)(i)

    October 2020 · Paper 1

    2 marks5.1 Aerobic respiration
    The whole paper ↗
    October 2020 Paper 1, question 9(b)(i): The body condition was expressed as a body condition index (BCI). The BCI can be calculated using the formula body mass of wombat BCI = mass-for-length of womba

  12. Q9(b)(ii)

    October 2020 · Paper 1

    6 marks5.1 Aerobic respiration
    The whole paper ↗
    October 2020 Paper 1, question 9(b)(ii): Analyse the data to explain the results of this investigation. (6)

  13. Q8(b)(ii)

    June 2019 · Paper 3

    4 marks4.1 Surface area to volume ratio5.1 Aerobic respiration
    The whole paper ↗
    June 2019 Paper 3, question 8(b)(ii): Explain the relationship between body mass and oxygen consumption in these mammals. (4)
All 13 questions on Aerobic respiration, as a list
  1. June 2025, Paper 1, Q2(b) (1 mark): Which row of the table shows the locations of glycolysis, the link reaction and the Krebs cycle in eukaryotic cells? (1) Glycolysis Link reaction Krebs cycle A
  2. June 2025, Paper 1, Q2(c)(i) (2 marks): The oxidation of one glucose molecule yields 2 870 224 Joules. The free energy stored in one ATP molecule is 30 566 Joules. Calculate the efficiency of energy t
  3. June 2025, Paper 1, Q2(c)(ii) (1 mark): State why this process is not 100 % efficient. (1)
  4. June 2024, Paper 1, Q7(c)(i) (2 marks): Explain why well‑stocked bird feeders containing nuts were available throughout this investigation. (2)
  5. June 2024, Paper 1, Q7(c)(ii) (6 marks): The graphs show the results of this investigation. Graph 1: volume of mitochondria Coal tit Blue tit Great tit Mean volume of mitochondria in red blood cells Se
  6. November 2021, Paper 1, Q2(a)(ii) (2 marks): Explain the results for the yeast cultured with glucose and the yeast cultured with maltose. (2)
  7. November 2021, Paper 1, Q5(b)(iii) (2 marks): Some scientists suggested that inhibiting both glycolysis and mitochondrial respiration may be an effective way of treating cancer cells. Explain why this sugge
  8. October 2020, Paper 1, Q7(d)(i) (1 mark): State why the RQ for carbohydrate is 1.0. (1)
  9. October 2020, Paper 1, Q7(d)(ii) (2 marks): The table shows the formula for calculating the volume of oxygen used and the volume of carbon dioxide produced in the respiration of lipids. The number of carb
  10. October 2020, Paper 1, Q7(e) (3 marks): Explain why an insect has an RQ of 1.0 at rest and an RQ of 0.7 during flight. (3)
  11. October 2020, Paper 1, Q9(b)(i) (2 marks): The body condition was expressed as a body condition index (BCI). The BCI can be calculated using the formula body mass of wombat BCI = mass-for-length of womba
  12. October 2020, Paper 1, Q9(b)(ii) (6 marks): Analyse the data to explain the results of this investigation. (6)
  13. June 2019, Paper 3, Q8(b)(ii) (4 marks): Explain the relationship between body mass and oxygen consumption in these mammals. (4)

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