Plant Physiology - Plant Growth & Development

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Q1. Which hormone is involved in the process of apical dominance? (2019)

Solution:

Auxins are primarily responsible for maintaining apical dominance by inhibiting the growth of lateral buds.

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Q2. Which plant hormone is primarily involved in the elongation of stems? (2023)

Solution:

Gibberellins are primarily responsible for stem elongation by promoting cell division and elongation.

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Q3. Which of the following processes is influenced by auxins? (2021)

Solution:

Auxins influence various processes including phototropism, gravitropism, and apical dominance.

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Q4. Which of the following is a function of cytokinins? (2019)

Solution:

Cytokinins stimulate lateral bud growth and delay leaf senescence.

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Q5. Which plant hormone is primarily involved in apical dominance? (2023)

Solution:

Auxins are primarily responsible for apical dominance, suppressing the growth of lateral buds.

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Q6. Which of the following processes is NOT influenced by auxins? (2021)

Solution:

Fruit ripening is primarily influenced by ethylene, not auxins.

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Q7. Which hormone is involved in the regulation of stomatal closure during water stress? (2023)

Solution:

Abscisic acid is involved in the regulation of stomatal closure during water stress to prevent water loss.

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Q8. Which plant hormone is primarily involved in seed germination? (2022)

Solution:

Gibberellins are crucial for breaking seed dormancy and promoting germination by stimulating enzyme production.

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Q9. Which hormone is primarily responsible for fruit ripening? (2023)

Solution:

Ethylene is the primary hormone responsible for the ripening of fruits.

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Q10. Which plant hormone is known to delay senescence in leaves? (2022)

Solution:

Cytokinins are known to delay senescence and promote cell division in plants.