Lesson 4.5.4.1

4.5.4.1 Control and coordination Quiz: AQA Biology, Unit 5

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 4.5.4.1, Control and coordination: 20 multiple choice questions for the AQA GCSE Biology (8461), Unit 5: Homeostasis and response, written with Revision Ninja.

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The 20 questions

  1. What do plant hormones coordinate and control in plants?

    • Digestion and circulation
    • Growth and responses
    • Photosynthesis and osmosis
    • Respiration and excretion

  2. What is a plant growth response to light called?

    • Phototropism
    • Gravitropism
    • Hydrotropism
    • Geotropism

  3. Gravitropism is growth in response to:

    • Touch
    • Light
    • Water
    • Gravity

  4. Which plant hormone is mainly involved in unequal growth rates in roots and shoots?

    • Thyroxine
    • Insulin
    • Auxin
    • Adrenaline

  5. Which hormone's unequal distribution causes unequal growth rates in plant roots and shoots?

    • Gibberellin
    • Auxin
    • Insulin
    • Ethene

  6. Which side of a plant shoot grows faster when exposed to light from one side?

    • Neither side
    • The root tip
    • The lit side
    • The shaded side

  7. Plant roots grow downwards. Which response is shown?

    • Chemotropism
    • Thigmotropism
    • Gravitropism
    • Phototropism

  8. What term describes a plant shoot growing towards light?

    • Positive gravitropism
    • Negative phototropism
    • Negative gravitropism
    • Positive phototropism

  9. In which direction does a horizontal plant shoot grow due to gravity?

    • Towards gravity
    • Horizontally
    • Downwards
    • Upwards

  10. In Required Practical 8, what type of diagram should students record?

    • Unlabelled line sketch
    • 3D computer model
    • Labelled biological drawing
    • Flowchart

  11. Required Practical 8 investigates light or gravity effects on which plant stage?

    • Dormant seeds
    • Fully grown trees
    • Newly germinated seedlings
    • Mature flowers

  12. What type of chemical compound is the plant substance auxin?

    • Vitamin
    • Antibody
    • Enzyme
    • Hormone

  13. Why do plants produce hormones such as auxin?

    • To absorb water
    • To perform photosynthesis
    • To control growth
    • To attract pollinators

  14. Which plant hormone coordinates both phototropism and gravitropism?

    • Ethene
    • Adrenaline
    • Auxin
    • Gibberellin

  15. What term describes a plant root growing downwards in response to gravity?

    • Negative phototropism
    • Negative gravitropism
    • Positive gravitropism
    • Positive phototropism

  16. Which system is absent in plant control and coordination?

    • Hormonal system
    • Growth regulation
    • Nervous system
    • Chemical signalling

  17. Where does auxin accumulate in a plant shoot exposed to light from one side?

    • Base of stem
    • Shaded side
    • Lit side
    • Root tip

  18. Which two stimuli are named in the specification for plant responses?

    • Gravity and touch
    • Water and temperature
    • Soil and wind
    • Light and gravity

  19. Why are plant shoots described as exhibiting positive phototropism?

    • Growth towards light
    • Growth away from gravity
    • Growth away from light
    • Growth towards gravity

  20. How do plant growth hormones coordinate growth in different parts of a plant?

    • Sending nerve signals
    • Transporting oxygen
    • Contracting muscle tissue
    • Altering growth rates

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