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Switching genes on and off: Edexcel A‑Level Biology A questions

Every Edexcel A-Level Biology A exam question on Switching genes on and off (specification points 7.16), 2016–2025, with its mark scheme and examiner’s report.

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1,749 questions

  1. Q7(b)(i)

    June 2023 · Paper 3

    1 markSwitching genes on and off
    Mark scheme (PDF)
    The whole paper ↗
    June 2023 Paper 3, question 7(b)(i): State what is meant by the term transcription factor. (1)

  2. Q2(a)(ii)

    November 2021 · Paper 3

    3 marksSwitching genes on and off
    The whole paper ↗
    November 2021 Paper 3, question 2(a)(ii): Explain how the acetylcholinesterase gene can be expressed in some tissues but not others. (3)

  3. Q4(b)

    October 2020 · Paper 3

    4 marksSwitching genes on and off
    The whole paper ↗
    October 2020 Paper 3, question 4(b): Gibberellins can activate the gene for amylase in rice seeds. Amylase is an enzyme that hydrolyses starch in the rice seeds. Devise an investigation to demonstr

  4. Q10(a)(iii)

    June 2019 · Paper 2

    2 marksSwitching genes on and off
    The whole paper ↗
    June 2019 Paper 2, question 10(a)(iii): The transcription factor Tfam is involved in the production of mitochondria. In investigation 3, some of the cells from the middle layer of the aortas of the mi

  5. Q1(b)

    June 2018 · Paper 2

    3 marksSwitching genes on and off
    The whole paper ↗
    June 2018 Paper 2, question 1(b): Beta cells in the pancreas produce insulin when there is an increase in glucose levels in the blood. Transcription factors are involved in the activation of the
All 5 questions on Switching genes on and off, as a list
  1. June 2023, Paper 3, Q7(b)(i) (1 mark): State what is meant by the term transcription factor. (1)
  2. November 2021, Paper 3, Q2(a)(ii) (3 marks): Explain how the acetylcholinesterase gene can be expressed in some tissues but not others. (3)
  3. October 2020, Paper 3, Q4(b) (4 marks): Gibberellins can activate the gene for amylase in rice seeds. Amylase is an enzyme that hydrolyses starch in the rice seeds. Devise an investigation to demonstr
  4. June 2019, Paper 2, Q10(a)(iii) (2 marks): The transcription factor Tfam is involved in the production of mitochondria. In investigation 3, some of the cells from the middle layer of the aortas of the mi
  5. June 2018, Paper 2, Q1(b) (3 marks): Beta cells in the pancreas produce insulin when there is an increase in glucose levels in the blood. Transcription factors are involved in the activation of the

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