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Importance of ATP: Eduqas A‑Level Biology questions

Every Eduqas A-Level Biology exam question on 1.1 Importance of ATP, 2016–2025, with its mark scheme and examiner’s report.

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2,061 questions

  1. Q1(a)(ii)

    June 2025 · Component 1

    3 marks1.1 Importance of ATP
    The whole paper ↗
    June 2025 Component 1, question 1(a)(ii): Describe the role of hydrogen ions in ATP synthesis. [3]

  2. Q1(a)(iii)

    June 2025 · Component 1

    2 marks1.1 Importance of ATP
    The whole paper ↗
    June 2025 Component 1, question 1(a)(iii): Explain why the two hydrogen carriers involved in aerobic respiration result in the synthesis of different numbers of ATP molecules. [2]

  3. Q1(b)(i)

    June 2025 · Component 1

    1 mark1.1 Importance of ATP
    The whole paper ↗
    June 2025 Component 1, question 1(b)(i): Explain why the resazurin was brought to the same temperature as the yeast and glucose mixtures before mixing. [1]

  4. Q1(b)(ii)

    June 2025 · Component 1

    2 marks1.1 Importance of ATP
    The whole paper ↗
    June 2025 Component 1, question 1(b)(ii): Explain the purpose of test tube A. [2] The colour of the contents of each test tube was recorded every three minutes for a period of 30 minutes. The colour of

  5. Q1(b)(iii)

    June 2025 · Component 1

    3 marks1.1 Importance of ATP
    The whole paper ↗
    June 2025 Component 1, question 1(b)(iii): I. Use all the information given to identify and explain how one limitation in this investigation could account for the variation in the results of other studen

  6. Q1(b)(iii)

    June 2024 · Component 1

    2 marks1.1 Importance of ATP
    The whole paper ↗
    June 2024 Component 1, question 1(b)(iii): Complete the table below to identify where in chloroplasts and mitochondria the following processes in ATP synthesis take place. [2] Process in ATP synthesis C

  7. Q1(c)(i)

    June 2024 · Component 1

    4 marks1.1 Importance of ATP
    The whole paper ↗
    June 2024 Component 1, question 1(c)(i): Use the tangent marked B–C to calculate the rate at 100 seconds following the addition of ADP and state the unit of your calculated value. Show how you obtained

  8. Q1(c)(ii)

    June 2024 · Component 1

    1 mark1.1 Importance of ATP
    The whole paper ↗
    June 2024 Component 1, question 1(c)(ii): Explain why the initial rate calculated using the line marked A was higher than the rate at 100 s. [1]

  9. Q1(a)(i)

    June 2023 · Component 1

    2 marks1.1 Importance of ATP
    The whole paper ↗
    June 2023 Component 1, question 1(a)(i): Name the following: I. the general term for the protein labelled C. [1] II. the enzyme found in protein complex D. [1]

  10. Q1(a)(ii)

    June 2023 · Component 1

    2 marks1.1 Importance of ATPC.3 Cell membranes and transport
    The whole paper ↗
    June 2023 Component 1, question 1(a)(ii): Explain why protons are moved through structure C by a form of active transport but through structure D by facilitated diffusion. [2]

  11. Q1(a)(iii)

    June 2023 · Component 1

    1 mark1.1 Importance of ATP
    The whole paper ↗
    June 2023 Component 1, question 1(a)(iii): X and Y represent a proton donor in two different forms. Explain why Y is the oxidised form of the proton donor. [1]

  12. Q1(b)(i)

    June 2023 · Component 1

    2 marks1.1 Importance of ATP
    The whole paper ↗
    June 2023 Component 1, question 1(b)(i): Name the two organelles in which structure D is found in eukaryotic cells and state precisely where it would be located in each of these organelles. [2] Name of

  13. Q1(b)(ii)

    June 2023 · Component 1

    1 mark1.1 Importance of ATP
    The whole paper ↗
    June 2023 Component 1, question 1(b)(ii): Complete the boxes below to show the reactants and products in the overall reaction that takes place in structure D. [1] + →

  14. Q1(b)(iii)

    June 2023 · Component 1

    1 mark1.1 Importance of ATP
    The whole paper ↗
    June 2023 Component 1, question 1(b)(iii): State if this reaction is endergonic or exergonic. Explain your answer. [1]

  15. Q2(a)(iii)

    June 2022 · Component 1

    4 marks1.3 Respiration releases chemical energy in biological processes1.1 Importance of ATP
    The whole paper ↗
    June 2022 Component 1, question 2(a)(iii): ATP acts as a common energy source for reactions in the cells of all living organisms. Most ATP in eukaryotic cells is synthesised in the mitochondria. Describe

  16. Q2(b)(i)

    June 2022 · Component 1

    3 marks1.1 Importance of ATP
    The whole paper ↗
    June 2022 Component 1, question 2(b)(i): The inner membranes of mitochondria in some cells of the flowers are permeable to protons. Using your knowledge of respiration in mitochondria, explain how this

  17. Q4(b)(ii)

    Autumn 2021 · Component 1

    1 mark1.1 Importance of ATP
    The whole paper ↗
    Autumn 2021 Component 1, question 4(b)(ii): The electrons are passed along a series of molecules in the membrane. State the name given to this series of molecules.  [1]

  18. Q4(b)(iii)

    Autumn 2021 · Component 1

    3 marks1.1 Importance of ATP
    The whole paper ↗
    Autumn 2021 Component 1, question 4(b)(iii): Describe how the energy released from the movement of these electrons is used.  [3]

  19. Q4(b)(iv)

    Autumn 2021 · Component 1

    3 marks1.1 Importance of ATP
    The whole paper ↗
    Autumn 2021 Component 1, question 4(b)(iv): Describe how ADP is phosphorylated as a result of the reaction shown in image 4.1. [3]

  20. Q6(a)(i)

    Autumn 2021 · Component 1

    4 marks1.1 Importance of ATP
    The whole paper ↗
    Autumn 2021 Component 1, question 6(a)(i): With reference to image 6.1 explain how cyanide would prevent the process of aerobic respiration. [4]
All 31 questions on Importance of ATP, as a list
  1. June 2025, Component 1, Q1(a)(ii) (3 marks): Describe the role of hydrogen ions in ATP synthesis. [3]
  2. June 2025, Component 1, Q1(a)(iii) (2 marks): Explain why the two hydrogen carriers involved in aerobic respiration result in the synthesis of different numbers of ATP molecules. [2]
  3. June 2025, Component 1, Q1(b)(i) (1 mark): Explain why the resazurin was brought to the same temperature as the yeast and glucose mixtures before mixing. [1]
  4. June 2025, Component 1, Q1(b)(ii) (2 marks): Explain the purpose of test tube A. [2] The colour of the contents of each test tube was recorded every three minutes for a period of 30 minutes. The colour of
  5. June 2025, Component 1, Q1(b)(iii) (3 marks): I. Use all the information given to identify and explain how one limitation in this investigation could account for the variation in the results of other studen
  6. June 2024, Component 1, Q1(b)(iii) (2 marks): Complete the table below to identify where in chloroplasts and mitochondria the following processes in ATP synthesis take place. [2] Process in ATP synthesis C
  7. June 2024, Component 1, Q1(c)(i) (4 marks): Use the tangent marked B–C to calculate the rate at 100 seconds following the addition of ADP and state the unit of your calculated value. Show how you obtained
  8. June 2024, Component 1, Q1(c)(ii) (1 mark): Explain why the initial rate calculated using the line marked A was higher than the rate at 100 s. [1]
  9. June 2023, Component 1, Q1(a)(i) (2 marks): Name the following: I. the general term for the protein labelled C. [1] II. the enzyme found in protein complex D. [1]
  10. June 2023, Component 1, Q1(a)(ii) (2 marks): Explain why protons are moved through structure C by a form of active transport but through structure D by facilitated diffusion. [2]
  11. June 2023, Component 1, Q1(a)(iii) (1 mark): X and Y represent a proton donor in two different forms. Explain why Y is the oxidised form of the proton donor. [1]
  12. June 2023, Component 1, Q1(b)(i) (2 marks): Name the two organelles in which structure D is found in eukaryotic cells and state precisely where it would be located in each of these organelles. [2] Name of
  13. June 2023, Component 1, Q1(b)(ii) (1 mark): Complete the boxes below to show the reactants and products in the overall reaction that takes place in structure D. [1] + →
  14. June 2023, Component 1, Q1(b)(iii) (1 mark): State if this reaction is endergonic or exergonic. Explain your answer. [1]
  15. June 2022, Component 1, Q2(a)(iii) (4 marks): ATP acts as a common energy source for reactions in the cells of all living organisms. Most ATP in eukaryotic cells is synthesised in the mitochondria. Describe
  16. June 2022, Component 1, Q2(b)(i) (3 marks): The inner membranes of mitochondria in some cells of the flowers are permeable to protons. Using your knowledge of respiration in mitochondria, explain how this
  17. Autumn 2021, Component 1, Q4(b)(ii) (1 mark): The electrons are passed along a series of molecules in the membrane. State the name given to this series of molecules.  [1]
  18. Autumn 2021, Component 1, Q4(b)(iii) (3 marks): Describe how the energy released from the movement of these electrons is used.  [3]
  19. Autumn 2021, Component 1, Q4(b)(iv) (3 marks): Describe how ADP is phosphorylated as a result of the reaction shown in image 4.1. [3]
  20. Autumn 2021, Component 1, Q6(a)(i) (4 marks): With reference to image 6.1 explain how cyanide would prevent the process of aerobic respiration. [4]
  21. Autumn 2021, Component 1, Q8 (9 marks): Images 8.1 and 8.2 show the structure of mitochondria and chloroplasts. Image 8.1 Mitochondria Image 8.2 Chloroplast Explain how the internal structures of mito
  22. Autumn 2020, Component 1, Q3(b)(ii) (3 marks): outline the process of chemiosmosis in an animal cell. [3]
  23. Autumn 2020, Component 1, Q3(d)(i) (2 marks): Explain how capsaicin reduces ATP production by BAT cells. [2]
  24. Autumn 2020, Component 1, Q3(d)(ii) (3 marks): Using all the information provided, suggest why eating red chili peppers causes sweating and reddening to the neck, shoulders and chest. [3]
  25. June 2019, Component 1, Q4(c)(i) (3 marks): Explain why the mitochondria were initially suspended in ice cold, isotonic buffer. [3]
  26. June 2019, Component 1, Q4(c)(iii) (3 marks): State one conclusion you can draw from this experiment and comment on the reliability of the results in the table shown. [3]
  27. June 2018, Component 1, Q1(c) (4 marks): A simple diagram showing ATP synthesis in a chloroplast and a Gram negative bacterium is shown below. Chloroplast Bacterium (E. coli) Thylakoid Intermembrane lu
  28. June 2017, Component 1, Q6(a) (2 marks): Following the establishment of an electrochemical gradient, describe the normal route that the protons would take in order to synthesise ATP. [2]
  29. June 2017, Component 1, Q6(b) (2 marks): Explain how DNP can act as an insecticide. [2] In the 1930s DNP in high doses was used as a dieting aid. People lost weight rapidly, they felt fatigued, sweated
  30. June 2017, Component 1, Q6(c) (4 marks): Explain in detail how DNP brings about the symptoms described. [4]
  31. June 2017, Component 1, Q6(d) (1 mark): How might DNP cause the rapid death of a person who is taking it to lose weight? [1]

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