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Q. No.Chromosomes duplicate during __A__ and increase in number of chromosomes is observed first during __B__. Identify A & B correctly.
1
A – Interphase
B – Prophase
2
A – S – phase
B – Telophase
3
A – Synthetic phase
B – Gap 2 phase
4
A – Interphase
B – Anaphase
Subtopic: Intro to Cell Cycle & Interphase | Cell Division: Mitosis (Karyokinesis) |
From NCERT
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Consider the given two statements:
| Statement I: | In male honeybees, haploid cells divide by mitosis. |
| Statement II: | Higher plants show mitotic divisions only in diploid cells. |
| 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 Division: Mitosis (Karyokinesis) |
58%
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 |
56%
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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The final stage of meiotic prophase I, diakinesis, is marked by:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| I: | terminalisation of chiasmata |
| II: | decondensation of chromosomes |
| III: | assembly of the meiotic spindle |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Cell Cycle: Meiosis I |
59%
From NCERT
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The given figure shows a cell at various stages of mitosis. What will be the number of chromosomes and content of DNA in the cells shown if the number of chromosomes and the content of DNA was 2N and 2C respectively at G1 phase?
1. 2N and 2C
2. 2N and 4C
3. 4N and 2C
4. 4N and 4C
1. 2N and 2C
2. 2N and 4C
3. 4N and 2C
4. 4N and 4C
Subtopic: Intro to Cell Cycle & Interphase | Cell Cycle: Meiosis II |
From NCERT
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Consider the given two statements:
| Assertion (A): | Metaphase is the stage at which morphology of chromosomes is most easily studied. |
| Reason (R): | At this stage, metaphase chromosome is made up of two sister chromatids, which are held together by the centromere. |
| 1. | (A) is True; (R) is False |
| 2. | Both (A) and (R) are True and (R) correctly explains (A) |
| 3. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 4. | (A) is False; (R) is True |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
From NCERT
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Consider the given two statements:
| Assertion (A): | Cell division is a very important process in all living organisms. |
| Reason (R): | During the division of a cell, DNA replication and cell growth also take place. |
| 1. | (A) is True; (R) is False |
| 2. | Both (A) and (R) are True and (R) correctly explains (A) |
| 3. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 4. | (A) is False; (R) is True |
Subtopic: Intro to Cell Cycle & Interphase |
From NCERT
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Unidentical chromatids of a chromosome move to opposite poles during:
1. Anaphase II
2. Telophase
3. Mitotic anaphase
4. Anaphase I
1. Anaphase II
2. Telophase
3. Mitotic anaphase
4. Anaphase I
Subtopic: Cell Cycle: Meiosis II |
55%
From NCERT
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Given below are two statements:
| Assertion (A): | During anaphase-1 of meiosis, non-homologous chromosomes separate. |
| Reason (R): | There is splitting of centromere during anaphase-1. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Cell Cycle: Meiosis I | Cell Cycle: Meiosis II |
62%
From NCERT
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