Lesson 3.1.6.1

3.1.6.1 ATP structure, hydrolysis and synthesis Quiz: AQA Biology, Unit 1

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 3.1.6.1, ATP structure, hydrolysis and synthesis: 20 multiple choice questions for the AQA Biology (7402), Unit 1: Biological molecules, written with Revision Ninja.

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The 20 questions

  1. Which three components combine to form a single molecule of ATP?

    • Ribose, guanine, phosphates
    • Ribose, adenine, phosphates
    • Deoxyribose, adenine, phosphates
    • Ribose, adenine, nitrates

  2. Which enzyme catalyses the hydrolysis of ATP to ADP and inorganic phosphate?

    • DNA polymerase
    • DNA helicase
    • ATP synthase
    • ATP hydrolase

  3. Which enzyme resynthesises ATP from ADP and inorganic phosphate during respiration or photosynthesis?

    • ATP hydrolase
    • DNA polymerase
    • Amylase
    • ATP synthase

  4. What are the products formed by the hydrolysis of ATP?

    • ADP and phosphate
    • ATP and water
    • AMP and glucose
    • Adenosine and ribose

  5. How many steps are required to release energy from ATP hydrolysis?

    • Three continuous steps
    • One single step
    • Many complex steps
    • Two sequential steps

  6. What term describes the transfer of a phosphate group to another molecule?

    • Condensation
    • Hydrolysis
    • Phosphorylation
    • Decarboxylation

  7. Which sugar forms part of ATP's structure?

    • Deoxyribose
    • Ribose
    • Glucose
    • Galactose

  8. How many water molecules are used in the hydrolysis of one molecule of ATP to ADP and Pi?

    • 0
    • 3
    • 2
    • 1

  9. The molar mass of ATP is 507 g/mol and that of ADP is 427 g/mol. Water (18 g/mol) is used in the hydrolysis. What is the molar mass of inorganic phosphate formed?

    • 80 g/mol
    • 116 g/mol
    • 525 g/mol
    • 98 g/mol

  10. Which enzyme catalyses the synthesis of ATP from ADP and inorganic phosphate?

    • DNA polymerase
    • Amylase
    • ATP synthase
    • ATP hydrolase

  11. Which enzyme catalyses the hydrolysis of ATP during active transport?

    • Peptidyl transferase
    • RNA polymerase
    • ATP synthase
    • ATP hydrolase

  12. What effect does phosphorylation have on glucose at the start of respiration?

    • Increases its reactivity
    • Increases its stability
    • Makes it insoluble
    • Decreases its reactivity

  13. Why do cells only need to maintain a small pool of ATP at any time?

    • Slowly consumed
    • Highly unstable
    • Rapidly recycled
    • Stored as fat

  14. Which type of reaction forms ATP from ADP and inorganic phosphate?

    • Oxidation
    • Condensation
    • Reduction
    • Hydrolysis

  15. Which type of energy store is ATP classified as in cells?

    • Long-term energy store
    • Permanent energy reservoir
    • Structural carbohydrate store
    • Immediate energy source

  16. What causes instability in the phosphate chain of an ATP molecule?

    • Positive charge attraction
    • Hydrophobic interactions
    • Hydrogen bond formation
    • Negative charge repulsion

  17. Which nitrogenous base is present in a molecule of ATP?

    • Cytosine
    • Guanine
    • Adenine
    • Thymine

  18. A cell hydrolyses ATP at a rate of 2 mol per second for 30 seconds. How many moles of water are used?

    • 60 mol
    • 2 mol
    • 30 mol
    • 120 mol

  19. What is the ratio of phosphate groups in ATP to phosphate groups in ADP?

    • 3:1
    • 3:2
    • 1:1
    • 2:3

  20. What term describes joining ATP hydrolysis directly to an energy-requiring reaction?

    • Coupling
    • Polymerisation
    • Denaturation
    • Phosphorylation

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