Q. No.
The PGR used to initiate flowering and for synchronizing fruit-set in pineapples is:
1. Abscisic acid
2. Cytokinin
3. Auxin
4. Ethylene
Cytokinin does not help in:
| 1. | Lateral shoot growth |
| 2. | Overcoming apical dominance |
| 3. | Adventitious shoot formation |
| 4. | Promoting leaf senescence |
In most situations, which of the following acts as an antagonist to GAs?
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
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