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Q. No.Humans have a haploid chromosome number n = 23. How many tetrads will be formed during meiosis?
1.
23
2.
46
3.
69
4.
92
Subtopic: Cell Cycle: Meiosis I | Cell Cycle: Meiosis II |
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The stage of mitosis shown in the given diagram is:
| 1. | Early Prophase | 2. | Late Prophase |
| 3. | Anaphase | 4. | Telophase |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
89%
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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. |
Subtopic: Intro to Cell Cycle & Interphase |
83%
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When a cell is preparing for mitosis, it is said to be in which phase of the cell cycle?
| 1. | G1 | 2. | G0 |
| 3. | S | 4. | G2 |
Subtopic: Intro to Cell Cycle & Interphase |
55%
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G1 phase in a cell cycle:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | corresponds to the interval between initiation of mitosis and DNA replication. |
| II: | is characterised by a metabolically active cell that grows continuously and replicates its DNA. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Intro to Cell Cycle & Interphase |
From NCERT
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Karyokinesis involves four stages that are chronologically [beginning at the earliest] arranged as:
1. Prophase → Metaphase → Anaphase → Telophase
2. Telophase → Metaphase → Anaphase → Prophase
3. Prophase → Metaphase → Anaphase → Telophase
4. Telophase → Anaphase → Metaphase → Prophase
1. Prophase → Metaphase → Anaphase → Telophase
2. Telophase → Metaphase → Anaphase → Prophase
3. Prophase → Metaphase → Anaphase → Telophase
4. Telophase → Anaphase → Metaphase → Prophase
Subtopic: Cell Division: Mitosis (Karyokinesis) |
87%
From NCERT
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During mitosis, the complete disintegration of the nuclear envelope marks the start of:
1. Prophase
2. Metaphase
3. Anaphase
4. Telophase
1. Prophase
2. Metaphase
3. Anaphase
4. Telophase
Subtopic: Cell Division: Mitosis (Karyokinesis) |
85%
From NCERT
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Which stage of prophase I of meiosis I can last for months or years in oocytes of some vertebrates?
1. Zygotene
2. Pachytene
3. Diplotene
4. Diakinesis
1. Zygotene
2. Pachytene
3. Diplotene
4. Diakinesis
Subtopic: Cell Cycle: Meiosis I |
91%
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In contrast to meiosis I, meiosis II:
| 1. | is much lengthy in duration. |
| 2. | leads to reduction in the number of chromosomes. |
| 3. | is characterised by replication of DNA just before its beginning. |
| 4. | resembles a normal mitosis. |
Subtopic: Cell Cycle: Meiosis II |
83%
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Duration of cell cycle can vary from:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | organism to organism |
| II: | from cell type to cell type in the same organism |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Intro to Cell Cycle & Interphase |
80%
From NCERT
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