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Control and coordination in mammals: CAIE A‑Level Biology questions

Every CAIE A-Level Biology exam question on 15.1 Control and coordination in mammals, June 2024 and the specimen papers, with its mark scheme and examiner’s report.

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240 questions

  1. Q2(a)(i)

    June 2024 · Paper 4

    2 marks15.1 Control and coordination in mammals
    The whole paper ↗
    June 2024 Paper 4, question 2(a)(i): Identify one similarity and one difference between paracrine cell signalling and cell signalling that occurs as part of the endocrine system. [2]

  2. Q2(a)(ii)

    June 2024 · Paper 4

    2 marks15.1 Control and coordination in mammals
    The whole paper ↗
    June 2024 Paper 4, question 2(a)(ii): Explain why a neurotransmitter such as acetylcholine could be described as a paracrine signalling molecule. [2]

  3. Q2(c)

    June 2024 · Paper 4

    3 marks15.1 Control and coordination in mammals
    The whole paper ↗
    June 2024 Paper 4, question 2(c): The process of protein translation is inhibited in developing muscle cells when stress genes are expressed. Suggest how developing muscle cells that express str

  4. Q10

    June 2024 · Paper 4

    6 marks15.1 Control and coordination in mammals
    The whole paper ↗
    June 2024 Paper 4, question 10: Humans detect the sweet taste of sucrose sugar using chemoreceptor cells in taste buds on the tongue. The red admiral butterfly, Vanessa atalanta, detects sucro

  5. Q2(a)

    Specimen · Paper 4

    3 marks15.1 Control and coordination in mammals
    The whole paper ↗
    Specimen Paper 4, question 2(a): Name the structures labelled A, B and C on Fig. 2.1. A B C [3]

  6. Q2(b)

    Specimen · Paper 4

    2 marks15.1 Control and coordination in mammals
    The whole paper ↗
    Specimen Paper 4, question 2(b): Describe the function of a motor neurone. [2]

  7. Q2(c)

    Specimen · Paper 4

    4 marks15.1 Control and coordination in mammals
    The whole paper ↗
    Specimen Paper 4, question 2(c): With reference to Fig. 2.1, explain the fast transmission of impulses along a motor neurone. [4] [Total: 9]

  8. Q5(a)(i)

    Specimen · Paper 4

    1 mark15.1 Control and coordination in mammals
    The whole paper ↗
    Specimen Paper 4, question 5(a)(i): Describe what happens in the sarcomere when the myosin head releases ADP and inorganic phosphate (Pi). [1]

  9. Q5(a)(ii)

    Specimen · Paper 4

    3 marks15.1 Control and coordination in mammals
    The whole paper ↗
    Specimen Paper 4, question 5(a)(ii): Explain the precise function of ATP in the sliding filament model. [3]
All 9 questions on Control and coordination in mammals, as a list
  1. June 2024, Paper 4, Q2(a)(i) (2 marks): Identify one similarity and one difference between paracrine cell signalling and cell signalling that occurs as part of the endocrine system. [2]
  2. June 2024, Paper 4, Q2(a)(ii) (2 marks): Explain why a neurotransmitter such as acetylcholine could be described as a paracrine signalling molecule. [2]
  3. June 2024, Paper 4, Q2(c) (3 marks): The process of protein translation is inhibited in developing muscle cells when stress genes are expressed. Suggest how developing muscle cells that express str
  4. June 2024, Paper 4, Q10 (6 marks): Humans detect the sweet taste of sucrose sugar using chemoreceptor cells in taste buds on the tongue. The red admiral butterfly, Vanessa atalanta, detects sucro
  5. Specimen, Paper 4, Q2(a) (3 marks): Name the structures labelled A, B and C on Fig. 2.1. A B C [3]
  6. Specimen, Paper 4, Q2(b) (2 marks): Describe the function of a motor neurone. [2]
  7. Specimen, Paper 4, Q2(c) (4 marks): With reference to Fig. 2.1, explain the fast transmission of impulses along a motor neurone. [4] [Total: 9]
  8. Specimen, Paper 4, Q5(a)(i) (1 mark): Describe what happens in the sarcomere when the myosin head releases ADP and inorganic phosphate (Pi). [1]
  9. Specimen, Paper 4, Q5(a)(ii) (3 marks): Explain the precise function of ATP in the sliding filament model. [3]

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