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Subtopic: Intro to Cell Cycle & Interphase | Cell Division: Mitosis (Karyokinesis) | Cell Division: Mitosis (Cytokinesis) |
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Identify the incorrect statement regarding mitosis:
| 1. | A single nucleus gives rise to two identical daughter nuclei. |
| 2. | The daughter nuclei are genetically identical to the parent nucleus. |
| 3. | The centromeres divide at the onset of anaphase. |
| 4. | Homologous chromosomes synapse in prophase. |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
86%
From NCERT
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Consider the following key events:
The stage of mitosis characterized by these key events is:
| I: | Chromosomes cluster at opposite spindle poles and their identity is lost as discrete elements. |
| II: | Nucleolus, Golgi complex and ER reform |
| 1. | Prophase | 2. | Metaphase |
| 3. | Anaphase | 4. | Telophase |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
89%
From NCERT
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In meiosis, the splitting of the centromere of each chromosome takes place during:
| 1. | Metaphase I | 2. | Metaphase II |
| 3. | Anaphase I | 4. | Anaphase II |
Subtopic: Cell Cycle: Meiosis II |
76%
From NCERT
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Consider the given two statements:
| Statement I: | At Metaphase I the chromosomes align at the equator and the microtubules from opposite poles of the spindle get attached to the kinetochores of sister chromatids. |
| Statement II: | At metaphase II the bivalent chromosomes align on the equatorial plate and microtubules from the opposite poles of the spindle attach to the kinetochore of homologous chromosomes. |
| 1. | Statement I is correct and Statement II is incorrect. |
| 2. | Statement I is incorrect and Statement II is incorrect. |
| 3. | Statement I is correct and Statement II is correct. |
| 4. | Statement I is incorrect and Statement II is correct. |
Subtopic: Cell Cycle: Meiosis I |
59%
From NCERT
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In telophase I:
| Statement I: | The nuclear membrane and nucleolus reappear. |
| Statement II: | The chromosomes reach the extremely extended state of the interphase nucleus. |
| 1. | Statement I is correct and Statement II is incorrect. |
| 2. | Statement I is incorrect and Statement II is incorrect. |
| 3. | Statement I is correct and Statement II is correct. |
| 4. | Statement I is incorrect and Statement II is correct. |
Subtopic: Cell Cycle: Meiosis I |
57%
From NCERT
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Regarding anaphase I:
| Statement I: | The homologous chromosomes separate, while sister chromatids remain associated at their centromeres. |
| Statement II: | It is the basis of segregation. |
| 1. | Statement I is correct and Statement II is incorrect. |
| 2. | Statement I is incorrect and Statement II is incorrect. |
| 3. | Statement I is correct and Statement II is correct. |
| 4. | Statement I is incorrect and Statement II is correct. |
Subtopic: Cell Cycle: Meiosis I |
79%
From NCERT
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Identify the incorrect statement regarding diakinesis of prophase I of meiosis I:
| 1. | It is the final stage of meiotic prophase I. |
| 2. | It is marked by terminalisation of chiasmata. |
| 3. | During this phase, the meiotic spindle is assembled to prepare the homologous chromosomes for separation. |
| 4. | By the end of diakinesis, the nucleolus reappears and the nuclear envelope also reappears. |
Subtopic: Cell Cycle: Meiosis I |
74%
From NCERT
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During prophase I of meiosis I, recombination between homologous chromosomes is completed:
1. in the Zygotene
2. in the beginning of the Pachytene
3. by the end of Pachytene
4. in the beginning of the Diplotene
1. in the Zygotene
2. in the beginning of the Pachytene
3. by the end of Pachytene
4. in the beginning of the Diplotene
Subtopic: Cell Cycle: Meiosis I |
76%
From NCERT
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During which stage of prophase I of meiosis I, the four chromatids of each of the bivalent chromosomes
become distinct and clearly appear as tetrads?
become distinct and clearly appear as tetrads?
| 1. | Leptotene | 2. | Zygotene |
| 3. | Pachytene | 4. | Diplotene |
Subtopic: Cell Cycle: Meiosis I |
72%
From NCERT
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