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Respiration: CAIE A‑Level Biology questions

Every CAIE A-Level Biology exam question on 12.2 Respiration, June 2024 and the specimen papers, with its mark scheme and examiner’s report.

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240 questions

  1. Q1(a)

    June 2024 · Paper 4

    3 marks12.2 Respiration
    The whole paper ↗
    June 2024 Paper 4, question 1(a): Fig. 1.1 shows a transmission electron micrograph of a mitochondrion. A B C D Fig. 1.1 Table 1.1 lists the four stages of aerobic respiration. With reference to

  2. Q1(b)

    June 2024 · Paper 4

    4 marks12.2 Respiration
    The whole paper ↗
    June 2024 Paper 4, question 1(b): In anaerobic conditions, no ATP can be synthesised by oxidative phosphorylation because the process stops. Explain why ATP synthesis by oxidative phosphorylatio

  3. Q1(c)

    June 2024 · Paper 4

    3 marks12.2 Respiration
    The whole paper ↗
    June 2024 Paper 4, question 1(c): Up to 60% of the ATP that is produced in cancer cells comes from lactate fermentation of glucose, even though oxygen is present. Scientists are developing cance

  4. Q8(a)

    Specimen · Paper 4

    6 marks12.2 Respiration
    The whole paper ↗
    Specimen Paper 4, question 8(a): During a sporting event, an athlete carries out aerobic respiration. Structures and compounds involved in aerobic respiration are listed, 1 to 10. 1 coenzyme A

  5. Q8(b)

    Specimen · Paper 4

    5 marks12.2 Respiration
    The whole paper ↗
    Specimen Paper 4, question 8(b): Sometimes the muscle cells of an athlete need to carry out respiration in anaerobic conditions. Explain why the respiration of glucose in anaerobic conditions p
All 5 questions on Respiration, as a list
  1. June 2024, Paper 4, Q1(a) (3 marks): Fig. 1.1 shows a transmission electron micrograph of a mitochondrion. A B C D Fig. 1.1 Table 1.1 lists the four stages of aerobic respiration. With reference to
  2. June 2024, Paper 4, Q1(b) (4 marks): In anaerobic conditions, no ATP can be synthesised by oxidative phosphorylation because the process stops. Explain why ATP synthesis by oxidative phosphorylatio
  3. June 2024, Paper 4, Q1(c) (3 marks): Up to 60% of the ATP that is produced in cancer cells comes from lactate fermentation of glucose, even though oxygen is present. Scientists are developing cance
  4. Specimen, Paper 4, Q8(a) (6 marks): During a sporting event, an athlete carries out aerobic respiration. Structures and compounds involved in aerobic respiration are listed, 1 to 10. 1 coenzyme A
  5. Specimen, Paper 4, Q8(b) (5 marks): Sometimes the muscle cells of an athlete need to carry out respiration in anaerobic conditions. Explain why the respiration of glucose in anaerobic conditions p

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