Homeostasis and ResponseAQA GCSE Biology (8461)

Plant Hormones

Work through the notes, try the practice questions, then take the quiz. The report tells you exactly what to revise next. (2026)

Practice progress

5 MCQs

0 of 5 attempted

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Remaining

1
Where is auxin produced in a plant?
Answer & explanation
Correct: option B
Auxin is produced at the actively growing tips of shoots and roots (meristem regions).
2
Which describes phototropism in a shoot?
Answer & explanation
Correct: option B
Shoots are positively phototropic — they grow towards light to maximise photosynthesis.
3
In a shoot exposed to light from one side, where does auxin accumulate?
Answer & explanation
Correct: option B
Auxin moves to the shaded side, where it makes cells elongate more, bending the shoot towards the light.
4
What is the effect of auxin in roots?
Answer & explanation
Correct: option B
In roots, auxin INHIBITS elongation — the opposite of its effect in shoots.
5
Which plant hormone is mainly responsible for ripening fruit?
Answer & explanation
Correct: option C
Ethene (ethylene) is a plant hormone gas that ripens fruit.

Homeostasis and ResponseAQA GCSE Biology (8461)

Work through the notes, try the practice questions, then take the quiz. The report tells you exactly what to revise next. (2026)

5 MCQs

0 of 5 attempted

Correct

Incorrect

Remaining

1
Where is auxin produced in a plant?
Answer & explanation
Correct: option B
Auxin is produced at the actively growing tips of shoots and roots (meristem regions).
2
Which describes phototropism in a shoot?
Answer & explanation
Correct: option B
Shoots are positively phototropic — they grow towards light to maximise photosynthesis.
3
In a shoot exposed to light from one side, where does auxin accumulate?
Answer & explanation
Correct: option B
Auxin moves to the shaded side, where it makes cells elongate more, bending the shoot towards the light.
4
What is the effect of auxin in roots?
Answer & explanation
Correct: option B
In roots, auxin INHIBITS elongation — the opposite of its effect in shoots.
5
Which plant hormone is mainly responsible for ripening fruit?
Answer & explanation
Correct: option C
Ethene (ethylene) is a plant hormone gas that ripens fruit.