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Q. No.The most dramatic period of the cell cycle does not involve:
1. Duplication of centrioles
2. Disintegration of nuclear envelope
3. Decondensation of chromosomes
4. Development of nuclear envelope
Subtopic: Cell Division: Mitosis (Karyokinesis) |
72%
From NCERT
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In which of the following phases of cell cycle, both, the amount of DNA as well as number of chromosomes in a cell is said to be double as compared to G1 phase of that cell?
1. Metaphase
2. G2 phase
3. Anaphase
4. Prophase
1. Metaphase
2. G2 phase
3. Anaphase
4. Prophase
Subtopic: Cell Division: Mitosis (Karyokinesis) |
70%
From NCERT
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The components of mitotic apparatus are:
(a) Kinetochores
(b) Centromeres
(c) Asters
(d) Spindle fibres
Choose the correct ones.
1. (b) and (d)
2. (c) and (d)
3. (a) and (c)
4. (b) and (c)
(a) Kinetochores
(b) Centromeres
(c) Asters
(d) Spindle fibres
Choose the correct ones.
1. (b) and (d)
2. (c) and (d)
3. (a) and (c)
4. (b) and (c)
Subtopic: Cell Division: Mitosis (Karyokinesis) |
81%
From NCERT
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Read the following statements and select the correct option.
1. Only statement A is correct.
2. Only statement B is correct.
3. Both statements are incorrect.
4. Both statements are correct.
| A: | Mitosis is seen in both diploid and haploid cells. |
| B: | Meiosis involves two sequential cycles of nuclear and cell division but only a single cycle of DNA replication. |
1. Only statement A is correct.
2. Only statement B is correct.
3. Both statements are incorrect.
4. Both statements are correct.
Subtopic: Cell Division: Mitosis (Karyokinesis) | Cell Cycle: Meiosis I |
80%
From NCERT
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During karyokinesis of mitosis phase, nuclear envelop is completely absent in:
1. Anaphase and telophase
2. Prophase and telophase
3. Metaphase and anaphase
4. Metaphase only
1. Anaphase and telophase
2. Prophase and telophase
3. Metaphase and anaphase
4. Metaphase only
Subtopic: Cell Division: Mitosis (Karyokinesis) |
81%
From NCERT
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The structure that serves as site of attachment of spindle fibres is:
| 1. | Made up of histone proteins wrapped around by DNA. |
| 2. | A small disc shaped structure at the surface of centromere. |
| 3. | Terminal end of chromosome. |
| 4. | Present between two sister chromatids in centromere. |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
91%
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 |
54%
From NCERT
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Each centrosome radiates out microtubules called:
1. Desmotubules
2. Asters
3. Centromeres
4. Spindle fibres
1. Desmotubules
2. Asters
3. Centromeres
4. Spindle fibres
Subtopic: Cell Division: Mitosis (Karyokinesis) |
80%
From NCERT
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if 22 chromosomes are present at G1 phase the cycle then, the number of chromosomes after G2 phase will be:
1. 44
2. 22
3. 66
4. 11
1. 44
2. 22
3. 66
4. 11
Subtopic: Intro to Cell Cycle & Interphase |
89%
From NCERT
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Spindle fibres begin to form during __(i)___ and attach to specific site of chromosomes during __(ii)__.
Select the correct option to fill in the blanks (i) and (ii).
Select the correct option to fill in the blanks (i) and (ii).
| (i) | (ii) | |
| (1) | Prophase | Metaphase |
| (2) | Anaphase | Telophase |
| (3) | Metaphase | Anaphase |
| (4) | Prophase | Anaphase |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
81%
From NCERT
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