Q. No.Identify the incorrect statement regarding the cell cycle of a typical eukaryotic cell:
1.
The interphase lasts more than 95% of the duration of the cell cycle.
2.
M phase starts with the nuclear division.
3.
Interphase is the resting stage in the cell cycle where the cell is metabolically inactive.
4.
Neurons in human body are permanently in G0 phase of the cell cycle.
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The components of nuclear envelope are dismantled during:
1. prophase and reconstructed during telophase
2. prophase and reconstructed during anaphase
3. metaphase and reconstructed during telophase
4. metaphase and reconstructed during anaphase
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Large protein complexes on the synaptonemal complex between two synapsed homologous chromosomes are called as:
| 1. | Kinetochore | 2. | Chiasmata |
| 3. | Recombination nodules | 4. | Telomeres |
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In G1 phase, a cell has 2N chromosome content and 2C DNA content. The chromosome and DNA content at the end of S phase in this cell would be:
| 1. 1N; 1C | 2. 2N; 2C |
| 3. 2N; 4C | 4. 4N; 4C |
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The cell shown in the diagram is most likely at:
| 1. | Metaphase I | 2. | Metaphase II |
| 3. | Anaphase I | 4. | Anaphase II |
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Consider the following two statements:
| I: | Plant cells undergo cytokinesis in a different manner than the animal cells. |
| II: | Plant cells are enclosed by a relatively inextensible cell wall. |
Of the two statements:
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. I is incorrect but II is correct
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During diakinesis of prophase I:
I. Terminalisation of chiasmata takes place.
II. Meiotic spindle is assembled.
III. Nucleolus disappears and the nuclear membrane breaks down.
The correct statements are:
| 1. | I, II and III | 2. | I and II only |
| 3. | I and III only | 4. | II and III only |
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During meiosis, the bivalent chromosomes clearly appear as tetrads first at:
| 1. | Zygotene of Prophase I | 2. | Pachytene of Prophase I |
| 3. | Metaphase I | 4. | Anaphase I |
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With respect to meiosis, when does DNA replication occur?
| 1. | Before meiosis I only | 2. | After meiosis I only |
| 3. | Before and after meiosis I | 4. | After meiosis II |
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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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