10 Multiple Choice Questions on Phototropism
1. What is phototropism?
Movement of plants towards sound
Growth movement in response to water
Growth movement in response to light
Movement of plants towards nutrients
Correct Answer
Wrong Answer
2. Which hormone is primarily responsible for phototropism?
Cytokinin
Gibberellin
Auxin
Ethylene
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3. Which part of the light spectrum primarily influences phototropism?
Red light
Green light
Blue light
Ultraviolet light
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4. What is positive phototropism?
Movement towards light
Movement away from light
Growth toward water
Growth toward soil
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5. Which part of the plant usually shows negative phototropism?
Stems
Leaves
Flowers
Roots
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6. What role do auxins play in phototropism?
Slow down cell growth
Elongate cells on the shaded side
Absorb light
Trigger flower growth
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7. Which receptors detect light in plants for phototropism?
Phototropins
Auxins
Cytokinins
Rhodopsins
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8. Phototropism helps plants primarily in which process?
Respiration
Photosynthesis
Germination
Pollination
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9. In phototropism, which direction does auxin move in the stem?
Towards the lighted side
Towards the shaded side
Evenly throughout the stem
Towards the roots
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10. Phototropism is most beneficial for plants in what type of environment?
High-light environments
Low-light environments
Underwater environments
Desert environments
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