Q. No.If a cell had 4[2 pairs] chromosomes at G1 phase, what would be the number of chromosomes in this cell at the end of anaphase?
1.
2
2.
4
3.
6
4.
8
The phase of the cell cycle that lasts for the least time is the:
| 1. | G1 phase | 2. | S phase |
| 3. | G2 phase | 4. | M phase |
All the following key events take place during telophase of mitosis except:
1. Chromosomes cluster at the opposite spindle poles
2. Chromosomes become discrete
3. Nuclear envelope reforms
4. Nucleolus, ER and Golgi complex reform
In a plant cell during the S phase of the cell cycle:
| I: | DNA replication begins in the nucleus |
| II: | Centriole duplicates in the cytoplasm |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Identify the incorrect statement regarding cytokinesis:
| 1. | Animal cells divide by cleavage furrow |
| 2. | Cell plate formation takes place during cytokinesis in plant cells |
| 3. | The cell wall formation in plant cells starts near the existing lateral walls and grows inwards |
| 4. | At cytokinesis, mitochondria and plastids are distributed between daughter cells |
Liquid endosperm in coconut forms due to:
1. Failure of cytokinesis after karyokinesis
2. Failure of karyokinesis before cytokinesis
3. Disruption of spindle fibers at metaphase
4. Continued DNA replication during cytokinesis
At the metaphase plate:
| 1. | The sister chromatids of a chromosome are connected by their kinetochores to the spindle fibers from the same pole |
| 2. | The non sister chromatids of a chromosome are connected by their kinetochores to the spindle fibers from the same pole |
| 3. | The sister chromatids of a chromosome are connected by their kinetochores to the spindle fibers from the opposite poles |
| 4. | The non sister chromatids of a chromosome are connected by their kinetochores to the spindle fibers from the opposite poles |
The Mitotic [M] phase of a typical eukaryotic cell is divided into:
| 1. | Two stages | 2. | Three stages |
| 3. | Four stages | 4. | Five stages |
During which stage of mitosis do the following events occur?
I. Centromeres split and chromatids separate
II. Chromatids move to opposite poles
| 1. | Prophase | 2. | Metaphase |
| 3. | Anaphase | 4. | Telophase |
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