Q. No.
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During what phase in the cell cycle would you find the most DNA per cell?
| 1. G1 | 2. G2 |
| 3. S | 4. Prophase II |
The phase of the cell cycle that is expected to be the most variable in duration in different types of cells in an animal will be:
| 1. G1 | 2. S |
| 3. G2 | 4. M |
Which stage of meiosis is shown in the diagram given below?
| 1. | Metaphase I | 2. | Metaphase II |
| 3. | Anaphase I | 4. | Anaphase II |
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In meiosis:
1. A single round of DNA replication is followed by two sequential divisions with chromosome number and DNA content getting reduced twice
2. A single round of DNA replication is followed by two sequential divisions with chromosome number getting reduced twice and DNA content getting reduced once
3. A single round of DNA replication is followed by two sequential divisions with chromosome number getting reduced once and DNA content getting reduced twice
4. A single round of DNA replication is followed by two sequential divisions with chromosome number and DNA content getting reduced once
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The mechanisms that contribute to the genetic variation arising from sexual reproduction include:
I. Independent assortment of chromosomes
II. Crossing over
III. Random fertilization
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II and III |
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Consider the following functions:
| I: | Replication of DNA along with the synthesis of nuclear proteins such as histones |
| II: | Duplication of centriole |
| III: | Synthesis of energy rich compounds and proteins |
Which of the above functions are carried out by a plant cell before it divides?
| 1. I only | 2. I, and II |
| 3. I and III | 4. I, II, and III |
A ribbon-like structure consisting of three protein components and extending across the region of synapsed chromosomes during the prophase of meiosis, is called:
| 1. | Phragmoplast | 2. | Phragmosome |
| 3. | Synaptonemal complex | 4. | Recombination nodule |
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The point of contact between paired chromatids during meiosis, resulting in a cross-shaped configuration and representing the cytological manifestation of crossing over is called:
| 1. | Centromere | 2. | Centrosome |
| 3. | Chiasmata | 4. | Tetrad |
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Organisms prefer sexual mode of reproduction in adverse conditions because:
| 1. | It leads to a rapid proliferation of numbers |
| 2. | It requires two individuals that can support the progeny |
| 3. | It is less energy consuming than the asexual mode of reproduction |
| 4. | It provides protection and increases variations that may help progeny to survive |
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