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Edexcel A‑Level Biology A questions by topic

Every question from every Edexcel A-Level Biology A (Salters-Nuffield) paper, 2016–2025, part by part. Filter by topic, paper or year, open the mark scheme under any question, and download a set as a PDF.

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Year 1 · AS

Year 2 · A‑Level only

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1,749 questions

  1. Q1(a)

    June 2025 · Paper 1

    3 marks
    The whole paper ↗
    June 2025 Paper 1, question 1(a): State three changes that take place in the body of a mammal in the first 24 hours after death. (3)

  2. Q1(b)(i)

    June 2025 · Paper 1

    1 mark
    The whole paper ↗
    June 2025 Paper 1, question 1(b)(i): Which of the following describes the sequence of organisms that colonise a body after death? (1) A bacteria, beetles, flies B bacteria, flies, beetles C fungi,

  3. Q1(b)(ii)

    June 2025 · Paper 1

    3 marks
    The whole paper ↗
    June 2025 Paper 1, question 1(b)(ii): Explain the effect of an increase in temperature on the rate of decomposition. (3)

  4. Q2(a)

    June 2025 · Paper 1

    1 mark
    The whole paper ↗
    June 2025 Paper 1, question 2(a): Which of the following describes the structure of starch? (1) A amino acids joined by glycosidic bonds B amino acids joined by peptide bonds C glucose molecules

  5. Q2(b)

    June 2025 · Paper 1

    2 marks
    The whole paper ↗
    June 2025 Paper 1, question 2(b): Enset is a plant related to the banana plant. It is grown in Ethiopia in Africa, where there is little rainfall and frequent droughts. (Source: © Silarock/Shutt

  6. Q2(c)

    June 2025 · Paper 1

    4 marks
    The whole paper ↗
    June 2025 Paper 1, question 2(c): Leaves of enset plants can be used to make fibres for weaving. Describe how the tensile strength of fibres from enset plants can be determined. (4)

  7. Q3(a)(i)

    June 2025 · Paper 1

    2 marks
    The whole paper ↗
    June 2025 Paper 1, question 3(a)(i): Describe what happens in the G1 phase of the cell cycle. (2)

  8. Q3(a)(ii)

    June 2025 · Paper 1

    3 marks
    The whole paper ↗
    June 2025 Paper 1, question 3(a)(ii): The graph shows the change in DNA content of a cell during the cell cycle. 4 3 Quantity of DNA / a.u. 2 1 Time Explain the changes in the quantity of DNA in a c

  9. Q3(b)

    June 2025 · Paper 1

    1 mark
    The whole paper ↗
    June 2025 Paper 1, question 3(b): The photograph shows cells from a root tip undergoing mitosis, as seen using a light microscope. (Source: © Dimarion/Shutterstock) What is the total number of c

  10. Q3(c)(i)

    June 2025 · Paper 1

    1 mark
    The whole paper ↗
    June 2025 Paper 1, question 3(c)(i): Which of the following describes stem cells in bone marrow? (1) A differentiated stem cells that produce only red blood cells B pluripotent stem cells that can

  11. Q3(c)(ii)

    June 2025 · Paper 1

    2 marks
    The whole paper ↗
    June 2025 Paper 1, question 3(c)(ii): Red blood cells contain haemoglobin, a globular protein. Describe the structure of a globular protein. (2)

  12. Q4(a)(i)

    June 2025 · Paper 1

    1 mark
    The whole paper ↗
    June 2025 Paper 1, question 4(a)(i): Which of the following defines the term species? (1) A a group of different organisms that live in the same habitat B a group of organisms that live in the same

  13. Q4(a)(ii)

    June 2025 · Paper 1

    3 marks
    The whole paper ↗
    June 2025 Paper 1, question 4(a)(ii): There are two populations of cheetah: the Asian cheetah and the African cheetah. Describe how gel electrophoresis can be used to determine that these two popula

  14. Q4(b)(i)

    June 2025 · Paper 1

    3 marks
    The whole paper ↗
    June 2025 Paper 1, question 4(b)(i): Explain the advantages of introducing cheetahs from these two populations. (3)

  15. Q4(b)(ii)

    June 2025 · Paper 1

    2 marks
    The whole paper ↗
    June 2025 Paper 1, question 4(b)(ii): The animals chosen were all born in the wild alongside other predators. Deduce why this may increase the survival chances of the cheetahs when they are relocate

  16. Q5(a)

    June 2025 · Paper 1

    3 marks
    The whole paper ↗
    June 2025 Paper 1, question 5(a): Describe the fluid mosaic structure of a cell surface membrane. (3)

  17. Q5(b)(i)

    June 2025 · Paper 1

    2 marks
    The whole paper ↗
    June 2025 Paper 1, question 5(b)(i): Explain how water enters these cells. (2)

  18. Q5(b)(ii)

    June 2025 · Paper 1

    1 mark
    The whole paper ↗
    June 2025 Paper 1, question 5(b)(ii): Some mineral ions are at a lower concentration in the soil than in the root hair cells. Which of the following describes how these mineral ions enter the cells

  19. Q5(c)

    June 2025 · Paper 1

    4 marks
    The whole paper ↗
    June 2025 Paper 1, question 5(c): Explain how the structure of tissues in the stem enables water to be transported from the roots to the leaves. (4)

  20. Q6(a)

    June 2025 · Paper 1

    1 mark
    The whole paper ↗
    June 2025 Paper 1, question 6(a): The following are aspects of the non-specific immune response. 1. Acidic conditions on the skin that are the optimum for bacterial enzymes 2. Lysozymes in tears

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