Which of the following chemicals is/are derived from tRNA?
1.
Kinetin
2.
IAA
3.
Zeatin
4.
More than one option is correct
Subtopic: Â Growth Hormones & Auxin |
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Fruit ripening is promoted by the hormone that
| 1. | Promotes thinning of fruits in cherry and walnut |
| 2. | Induce parthenocarpy in tomato |
| 3. | Promotes flowering in Lemna |
| 4. | Is derived from tRNA |
Subtopic: Â Ethylene |
 80%
From NCERT
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Abscisic acid is useful in
1. Cell division
2. Seed development
3. Germination of peanut seeds
2. Seed development
3. Germination of peanut seeds
4. Increasing length of stalks in grapes
Subtopic: Â Abscisic Acid |
 74%
From NCERT
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Dormancy in seeds may be due to presence of certain chemicals like
1. Phenolic acid
2. Zeatin
3. NM
4. Amylase
1. Phenolic acid
2. Zeatin
3. NM
4. Amylase
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Viviparous type of seed germination is found in
1. Sonneratia
2. Rhizophora
3. Oryza sativa
4. Both (1) & (2)
1. Sonneratia
2. Rhizophora
3. Oryza sativa
4. Both (1) & (2)
 74%
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What is meant by vivipary in plants?
1. Seed germination with subterranean cotyledons
2. Seed germination with epiterranean cotyledons
3. Fruit development without pollination
4. Seed germination inside fruit, while the fruit is still attached to plant
1. Seed germination with subterranean cotyledons
2. Seed germination with epiterranean cotyledons
3. Fruit development without pollination
4. Seed germination inside fruit, while the fruit is still attached to plant
 63%
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Which of the following plants do not show any correlation between exposure to light duration and induction of flowering response?
1. Long-day plant
2. Day-neutral plant
3. Short day plant
4. All of these
2. Day-neutral plant
3. Short day plant
4. All of these
 80%
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Which of the following pair is incorrectly matched?
1. Tomato - Day-neutral plant
2. Wheat - Short day plant
3. Henbane - Long day plant
4. Sugarcane - Short-day plant
1. Tomato - Day-neutral plant
2. Wheat - Short day plant
3. Henbane - Long day plant
4. Sugarcane - Short-day plant
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What is vernalisation?
1. Flowering is induced only when plant is exposed to certain duration of photoperiod
2. Flowering is either quantitatively or qualitatively dependent on exposure to low-temperature
3. Presence of different kinds of structure in response to environment or phases of life
4. All changes that an organism goes through during its life cycle
1. Flowering is induced only when plant is exposed to certain duration of photoperiod
2. Flowering is either quantitatively or qualitatively dependent on exposure to low-temperature
3. Presence of different kinds of structure in response to environment or phases of life
4. All changes that an organism goes through during its life cycle
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Stimulus of low temperature in vernalisation is perceived by
1. Leaves
2. Embryo of the seed
3. Flower
4. Pericarp
1. Leaves
2. Embryo of the seed
3. Flower
4. Pericarp
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