Q. No.In most situations, which of the following acts as an antagonist to GAs?
1. ABA
2. IAA
3. Kinetin
4. Ethylene
1. ABA
2. IAA
3. Kinetin
4. Ethylene
Which of the following is the site for perception of light/dark in plants?
1. Root apex
2. Shoot apex
3. Leaves
4. Flower
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 |
Plant Growth Regulators (PGRs) are not
1. Very less in number in plants
2. Small and simple molecules
3. Diverse chemical composition
4. Plant hormones or phytohormones
N6- furfurylamino purine and kinetin are derivative of …….
(1) Indol compounds
(2) Adenine
(3) carotenoids
(4) Terpenes
Abscisic Acid and ABA are derivative of…..
(1) Indol compounds
(2) Adenine
(3) carotenoids
(4) Terpenes
In the living plant body, the PGRs can be broadly divided into two groups. This classification is actually based on
(1) Function
(2) Structure
(3) Metabolism
(4) Kinetin
Plant growth promotors are not involved in
(1) Cell division, cell enlargement
(2) Pattern formation, seed formation
(3) Dormancy, Abscission
(4) Fruiting and Flowering
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