Among the following substance, select the substance/(s) that can be employed to delay leaf senescence.
a. Autoclaved herring sperm DNA
b. Corn-kernel suspension
c. Coconut milk
1. Only a
2. Only a and c
3. Only b and c
4. all a, b and c

Subtopic:  Growth Hormones & Auxin |
 84%
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Which of the following methods can be used for hedge-making in a garden?
1. Vernalization
2. Exposure of plant to high-intensity light
3. Application of cytokinin
4. Irrigation
Subtopic:  Auxin Function |
 59%
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Which of the following fruits cannot be artificially ripened by gaseous plant hormones?
1. Tomato
2. Cherry
3. Mango
4. Banana
Subtopic:  Ethylene |
 60%
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Internode elongation in deep water rice plants can be achieved by:
1. GA
2. Ethylene
3. Cytokinin
4. Auxin
Subtopic:  Ethylene |
 86%
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How many of the following PGRs does/do not show acidic nature?
A. Auxin         
B. Gibberellins
C. Cytokinin     
D. Ethylene
E. ABA

1. One
2. Two
3. Three
4. Four
Subtopic:  Growth Hormones & Auxin |
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Shelf-life of fruits can be increased by applications of:
1. Auxins
2. GA
3. Ethylene
4. ABA
Subtopic:  Gibberellin |
 77%
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The carbohydrate content of sugarcane can be increased with the help of:
1. ABA
2. Ethylene
3. GA
4. Auxin
Subtopic:  Gibberellin |
 92%
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Which of the following types of movement is/are exhibited by Auxin?
1. Only centripetal
2. Only basipetal
3. Only acropetal
4. Both acropetal abd basipetal 
Subtopic:  Growth |
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Which of the following hormones is associated with phototropic and geotropic movement plants?
1. Ethylene
2. GA
3. ABA
4. Auxin
Subtopic:  Auxin Function |
 85%
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Which of the following locations in plants have the highest concentration of auxin?
1. Young fruits
2. Shoot apices
3. Vascular cambium
4. Leaves
Subtopic:  Growth Hormones & Auxin |
 83%
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