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प्रश्न
What is G0 (quiescent phase) of cell cycle?
उत्तर
- The G0 phase occurs when the cell cycle is inactivated because mitogens and substances high in energy are not available.
- At this stage, cells still have an active metabolism but stop proliferating, meaning they don't grow or differentiate unless the organism requires them to.
- For instance, chordate nerve and heart cells are always in the G0 phase.
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संबंधित प्रश्न
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)
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 fruit fly has 8 chromosomes (2n) in each cell. During the interphase of Mitosis if the number of chromosomes in G1 phase is 8, what would be the number of chromosomes after the S phase?
Mitosis is characterised by ______.
Between a prokaryote and a eukaryote, which cell has a shorter cell division time?
Which of the phases of cell cycle is of longest duration?
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.
