Q. No.Kinetin (cytokinin) was first discovered as a breakdown products of
1. DNA
2. t-RNA
3. Spindle fibres
4. m-RNA
Thinning of cotton and promotion of femaleness in cucumber are physiological effects of PGR which
| 1. | Helps of withstand desiccation conditions and is antagonistic to GAs |
| 2. | Increases the market period of fruits by delaying senescence |
| 3. | Is synthesized in large amounts in ripening fruits and tissues undergoing senescence |
| 4. | Prevents fruit and leaf drop at early stages and produced by growing apices of stem |
Plant growth regulator, which promotes senescence and abscission of plant organs, is also related to which of the following physiological effects?
| 1. | Thinning of cotton, cherry, and walnut |
| 2. | Overcome apical dominance |
| 3. | Early seed production in conifers |
| 4. | Formation of new leaves |
Read following statements and answer in suitable term given in option:-
a. The promotion of flowering by a period of low temperature
b. Hormonal substance migrates from leaves to shoot for inducing flowering
c. The general metabolic activity of the embryo slow down or in inactive state
d. Formation of separation layer between tissue
1. Photoperiodism, vernalisation, abscission layer, dormancy
2. Vernalisation, photoperiodism, dormancy, abscission layer
3. Dormancy, photoperiodism, vernalisation, abscission layer
4. Abscission layer, vernalisation, dormancy, photoperiodism
Which of the following is not a natural mean to remove seed coat?
(1) Microbial action
(2) Passage through Digestive tract
(3) Vigorous shaking
(4) Both (2) and (3)
Match the following :-
|
Column A |
Column B |
||
|
(i) |
Auxin |
(a) |
Brewing industry |
|
(ii) |
Gibbrelic Acid |
(b) |
Xylem differentiation |
|
(iii) |
Cytokinin |
(c) |
Fruit ripening |
|
(iv) |
Ethylene |
(d) |
Overcome Apical dominance |
| 1. | (i) (b), (ii) (a), (iii) (d), (iv) (c) |
| 2. | (i) (b), (ii) (a), (iii) (c), (iv) (d) |
| 3. | (i) (a), (ii) (b), (iii) (d), (iv) (c) |
| 4. | (i) (b), (ii) (d), (iii) (a), (iv) (c) |
Which of the following is not an inhibitory substance governing seed dormancy?
1. Abscisic acid
2. Phenolic acid
3. Para-ascorbic acid
4. Gibberellic acid
Which of the given hormones is used to produce parthenocarpic or seedless banana and tomatoes?
1. Auxin
2. Cytokinin
3. Abscisic acid
4. Kinetin
In order to increase the yield of sugarcane crops, which of the following plant growth regulators should be sprayed?
| 1. | Ethylene | 2. | Auxins |
| 3. | Gibberellins | 4. | Cytokinins |
Removal of shoot tips is a very useful technique to boost the production of tea leaves. This is because:
| 1. | Gibberellins prevent bolting and are inactivated. |
| 2. | Auxins prevent leaf drop at early stages. |
| 3. | Effect of auxins is removed and the growth of lateral buds is enhanced. |
| 4. | Gibberellins delay the senescence of leaves. |
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