Practice important
Agricultural Applications
MCQ questions and answers.
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10
MCQ Questions
1. Gibberellins are commonly applied to seedless grapes to increase their:
A.
Fruit size
B.
Root branching
C.
Leaf thickness
D.
Flower colour
Correct Answer:
Fruit size
Explanation:
Gibberellin treatment helps increase the size and elongation of seedless grape berries, making them more suitable for cultivation and marketing.
2. In sugarcane, gibberellins are used mainly to increase:
A.
Internode length
B.
Seed production
C.
Root hair formation
D.
Flower colour
Correct Answer:
Internode length
Explanation:
Gibberellins promote elongation of sugarcane internodes, which increases the length and overall yield of the cane.
3. Gibberellins are used in brewing industries to promote the germination of:
A.
Barley grains
B.
Rice grains
C.
Maize roots
D.
Wheat leaves
Correct Answer:
Barley grains
Explanation:
Gibberellins are applied during malting to stimulate barley grain germination and enzyme production needed in brewing.
4. Application of gibberellin can produce seedless fruits by inducing:
A.
Parthenocarpy
B.
Pollination
C.
Seed dormancy
D.
Root nodulation
Correct Answer:
Parthenocarpy
Explanation:
Gibberellins can induce fruit development without fertilisation, a process called parthenocarpy, resulting in seedless fruits.
5. Gibberellins are applied to some plants to promote early flowering and reduce the time needed for:
A.
Bolting
B.
Fruit storage
C.
Seed drying
D.
Root pruning
Correct Answer:
Bolting
Explanation:
Gibberellins promote stem elongation and bolting in certain plants, which can help induce early flowering in agricultural crops.
6. Which agricultural product is commonly treated with gibberellins to improve the size of its berries?
A.
Grapes
B.
Potatoes
C.
Carrots
D.
Onions
Correct Answer:
Grapes
Explanation:
Gibberellin sprays are widely used in grape cultivation to enlarge berries and improve bunch quality, especially in seedless varieties.
7. Gibberellin treatment of sugarcane can increase crop yield because it promotes:
A.
Stem elongation
B.
Leaf fall
C.
Seed coat thickening
D.
Root decay
Correct Answer:
Stem elongation
Explanation:
By stimulating stem and internode elongation, gibberellins increase the amount of cane available for sugar production.
8. In malting, gibberellins help barley produce enzymes that break down:
A.
Stored food reserves
B.
Flower pigments
C.
Root hairs
D.
Leaf waxes
Correct Answer:
Stored food reserves
Explanation:
Gibberellins stimulate enzyme production during barley germination, helping mobilise stored food reserves for the malting process.
9. A farmer may use gibberellins on certain fruits to encourage fruit development without:
A.
Fertilisation
B.
Irrigation
C.
Photosynthesis
D.
Harvesting
Correct Answer:
Fertilisation
Explanation:
Gibberellins can induce parthenocarpic fruit development, allowing fruits to form without fertilisation and often producing seedless fruits.
10. Which use of gibberellins is associated with improving the commercial quality of seedless grapes?
A.
Increasing berry size
B.
Reducing stem length
C.
Preventing fruit formation
D.
Increasing seed number
Correct Answer:
Increasing berry size
Explanation:
Gibberellin application enlarges seedless grape berries, improving their appearance and commercial value.
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Agricultural Applications
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