It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?

1. Cytokinin and Abscisic acid

2. Auxin and Ethylene

3. Gibberellin and Cytokinin

4. Gibberellin and Abscisic acid

Subtopic:  Auxin Function |
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What is the site of perception of photoperiod necessary for induction of flowering in plants?

1.  Leaves

2.  Lateral buds

3.  Pulvinus

4.  Shoot apex

Subtopic:  Photoperiodism |
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Which one of the following pairs, is not correctly matched?

1. Abscisic acid - Stomatal closure

2. Gibberellic acid - Leaf fall

3. Cytokinin - Cell division

4. IAA - Cell wall elongation

Subtopic:  Gibberellin |
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"Foolish seedling" disease of rice led to the discovery of:

1. GA

2. ABA

3. 2, 4-D

4. IAA

Subtopic:  Gibberellin |
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Which one of the following acids is a derivative of carotenoids?

1. Indole-butyric acid

2. Indole-3-acetic acid

3. Gibberellic acid

4. Abscisic acid`

Subtopic:  Abscisic Acid |
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One of the synthetic auxin is

1. NAA

2. IAA

3. GA

4. IBA

Subtopic:  Growth Hormones & Auxin | Auxin Function |
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Which one of the following growth regulators is known as stress hormone ?

1. Abscissic acid

2. Ethylene

3. GA3

4. Indole acetic acid

Subtopic:  Abscisic Acid |
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Typical growth curve in plants is
1. sigmoid
2. linear
3. stair-steps shaped
4. parabolic

 

Subtopic:  Growth Model |
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Fruit and leaf drop at early stages can be prevented by the application of:

1. Ethylene

2. Auxins

3. Gibberellic acid

4. Cytokinins

Subtopic:  Auxin Function |
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You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots?

1.  IAA and gibberellin

2.  Auxin and cytokinin

3.  Auxin and abscisic acid

4.  Gibberellin & abscisic acid

Subtopic:  Auxin Function | Cytokinin |
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