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Q. No.Given below are two statements:
Assertion (A):
Meiosis induces new combination of traits in organisms.
Reason (R):
Crossing over occurs between sister chromatids of chromosomes.
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.
t.
Subtopic: Cell Cycle: Meiosis I |
72%
Level 2: 60%+
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During vegetative growth in multicellular organisms, the number of daughter cells produced by each cell division is.
1. Six
2. Two
3. Four
4. Eight
1. Six
2. Two
3. Four
4. Eight
Subtopic: Intro to Cell Cycle & Interphase |
82%
Level 1: 80%+
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At the onset of anaphase
| 1. | Chromosomal material condenses. |
| 2. | Nucleolus, Golgi complex and ER reform. |
| 3. | Chromosomes move to spindle equator and get aligned. |
| 4. | Chromosomes arranged at metaphase plate split simultaneously. |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
79%
Level 2: 60%+
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Which of the following stages of cell are considered to be a part of cell cycle?
The correct ones are:
1. Only (a), (b) & (d)
2. Only (b) & (d)
3. Only (b), (c) & (d)
4. All (a), (b), (c) & (d)
| (a) | G0 stage |
| (b) | Post mitotic gap phase |
| (c) | Resting phase |
| (d) | Separation of cytoplasm |
1. Only (a), (b) & (d)
2. Only (b) & (d)
3. Only (b), (c) & (d)
4. All (a), (b), (c) & (d)
Subtopic: Cell Division: Mitosis (Karyokinesis) | Cell Division: Mitosis (Cytokinesis) |
Level 3: 35%-60%
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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) |
74%
Level 2: 60%+
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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 |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
71%
Level 2: 60%+
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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%
Level 1: 80%+
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Read the following statements and select the correct option.
| 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%
Level 1: 80%+
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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 |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
82%
Level 1: 80%+
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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) |
92%
Level 1: 80%+
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