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प्रश्न
Distinguish cytokinesis from karyokinesis.
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उत्तर
| Cytokinesis | Karyokinesis | |
| 1 | Cytokinesis is the division of the cytoplasm of cell. | Karyokinesis is the division of the nucleus of a cell. |
| 2 | It occur at the end of M-phase, after the neculear division is over. | It occur during M-Phase of cell cycle before cytokinesis begin to proceed. |
| 3 | Stages such as prophase, metaphase, anaphase, and telophase are not present in cytokinesis. | It is divided into four stages: prophase, metaphase, anaphase, and telophase |
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संबंधित प्रश्न
Describe the events taking place during interphase.
Why is mitosis called equational division?
Name the phase of the cell cycle at which the following event occurs:
Crossing over between homologous chromosomes takes place.
Analyse the events during every stage of cell cycle and notice how the following two parameters change.
- Number of chromosomes (N) per cell
- Amount of DNA content (C) per cell
Cells in the quiescent stage (Go)
Name the stage of mitosis in which chromosomes are arranged on the equator of spindle:
Match List - I with List - II.
| List I | List II | ||
| (a) | S phase | (i) | Proteins are synthesized |
| (b) | G2 phase | (ii) | Inactive phase |
| (c) | Quiescent stage | (iii) | Interval between mitosis and initiation of DNA replication |
| (d) | G1 phase | (iv) | DNA replication |
Choose the correct answer from the options given below.
The centriole undergoes duplication during ______
Mitosis is characterised by ______.
Cells which are not dividing are likely to be at ______.
Between a prokaryote and a eukaryote, which cell has a shorter cell division time?
Label the diagram and also determine the stage at which this structure is visible.
While examining the mitotic stage in a tissue, one finds some cells with 16 chromosomes and some with 32 chromosomes. What possible reasons could you assign to this difference in chromosome number. Do you think cells with 16 chromosomes could have arisen from cells with 32 chromosomes or vice versa?
Mitosis results in producing two cells which are similar to each other. What would be the consequence if the following irregularities occur during mitosis?
Duplication of DNA does not occur
Two key events take place, during S phase in animal cells, DNA replication and duplication of centriole. In which parts of the cell do events occur?
Name the phase of the cell cycle at which the following event occurs:
Centromere splits and chromatids separate.
Spindle fibers attach to kinetochores of chromosomes during ______.
Statement I: During GO phase of cell cycle, the cell is metabolically inactive.
Statement II: The centrosome undergoes duplication during S phase of interphase.
In the light of the above statements, choose the most appropriate answer from the options given below:
