All the following plants are biennials except:-
1. Sugarbeet
2. Cabbages
3. Carrots
4. Wheat
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 |
The PGR used to induce parthenocarpy in tomatoes is:-
1. Auxin
2. Gibberellin
3. Cytokinin
4. ABA
Primary and secondary growth are inhibited by:
1. Auxins
2. Gibberellins
3. Abscisic acid
4. Cytokinins
Fruit and leaf drop at early stages can be prevented by the application of
1. Cytokinins
2. ethylene
3. auxins
4. gibberellic acid
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
Phytochrome is a
(1) flavoprotein
(2) glycoprotein
(3) lipoprotein
(4) chromoprotein
The Avena curvature is used for bioassay of
(1) GA3
(2) IAA
(3) Ethylene
(4) ABA
Auxin can be bioassayed by
1. Avena coleoptile curvature
2. hydroponics
3. potometer
4. lettuce hypocotyl elongation
What causes a green plant exposed to the light on only one side, to bend toward the
source of light as it grows?
1. Green plants need light to perform photosynthesis
2. Green plants seek light because they are phototropic
3. Light stimulates plant cells on the lighted side to grow faster
4. Auxin accumulates on the shaded side, stimulating greater cell elongation there