QQuestion
Write the name of the chemical constituents of eukaryotic chromosome with the help of a table. What happens to a cell when the cell loses control at different points in cell cycle on division ? [3+2=5]
OR
What events occur during Anaphase stage of mitotic cell division ?Show the steps of sexual reproduction of flowering plants with the help of word diagram. [3+2=5]
✓Answer
Chemical Constituents of Eukaryotic Chromosome
| Chemical Constituent | Role |
|---|---|
| DNA | Carries genetic information |
| Histone Proteins | Help in packaging and organizing DNA |
| Non-histone Proteins | Involved in regulation of gene expression and chromosome structure |
When a cell loses control at different points in the cell cycle during division, it may result in uncontrolled cell division leading to cancer. The checkpoints which normally regulate the progression of the cell cycle fail, causing abnormal growth and proliferation of cells without the usual regulatory mechanisms.
Or
Events during Anaphase of Mitotic Cell Division
- Centromeres split and sister chromatids separate.
- Chromatids move towards opposite poles of the cell.
- Cell elongates preparing for division.
Steps of Sexual Reproduction in Flowering Plants (Word Diagram)
Pollination → Fertilization → Zygote formation → Embryo development → Seed formation → Seed germination
Additional diagram (No need to draw)
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