At the root apex the cells of the meristematic region are not characterized by:-

1. Being rich in protoplasm
2. Abundant plasmodesmatal connections
3. A cell wall that is primary in nature
4. Having small inconspicuous nuclei

Subtopic:  Growth |
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All the following plants are biennials except:-
1. Sugarbeet
2. Cabbages
3. Carrots
4. Wheat

Subtopic:  Vernalization |
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Identify the option where all the columns are not correctly matched:

 

PGR

Nature

Actions

1.

Auxin

Indole compounds

Apical dominance, Flowering in pineapples, Parthenocarpy in tomatoes

2.

Cytokinin

Adenine derivative

 

Cell division, Adventitious shoot formation, Delay in leaf senescene

3.

Gibberellin

Terpene

Increase in length

4 .

ABA

Carotenoid derivative

Closure of stomata in water stress, inducing seed dormancy, inducing flowering in mango

 

Subtopic:  Abscisic Acid |
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The PGR used to induce parthenocarpy in tomatoes is:-

1. Auxin
2. Gibberellin
3. Cytokinin
4. ABA

Subtopic:  Growth Hormones & Auxin |
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Primary and secondary growth are inhibited by:

1. Auxins

2. Gibberellins

3. Abscisic acid

4. Cytokinins

Subtopic:  Abscisic Acid |
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Fruit and leaf drop at early stages can be prevented by the application of 
1. Cytokinins
2. ethylene
3. auxins
4. gibberellic acid 

Subtopic:  Growth Hormones & Auxin |
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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) Glbberellin & abscisic acid

Subtopic:  Auxin Function | Cytokinin |
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Phytochrome is a 
(1) flavoprotein

(2) glycoprotein

(3) lipoprotein

(4) chromoprotein

Subtopic:  Photoperiodism |
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The Avena curvature is used for bioassay of 
(1) GA3

(2) IAA

(3) Ethylene

(4) ABA

Subtopic:  Growth Hormones & Auxin |
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Auxin can be bioassayed by

1. Avena coleoptile curvature

2. hydroponics

3. potometer

4. lettuce hypocotyl elongation

Subtopic:  Growth Hormones & Auxin |
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