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The cell nucleus

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BASIC INFORMATION …

BASIC INFORMATION


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  • 1. THE CELL NUCLEUS (BASIC) Presented By: Hina Amir.
  • 2. The Cell Nucleus IntroductionCell is a fundamental component of life containingdifferent organelles.Nucleus ―A cell organelle.It is known as nerve center or control center of cell.
  • 3. Size And Shape It is a spherical organelle. Accounts 10 of cell’s volume. It ranges from 2-5 micron meter in diameter.
  • 4. Discovery It was discovered by A .V Leeuwenhoek for first time. Franz Bauer in 1802 also described it. Scottish botanist Robert Brown explained it in more detail. After that it was concluded that it is a membrane bounded organelle found in eukaryotic cells.
  • 5. Structure Of Nucleus Nuclear membrane. Nuclear pores. Nuclear lamina. Chromosomes. Nucleolus.
  • 6. Nuclear membrane It is two layered. With 10-50nm separation. Prevent genetic material. Form nuclear pores.
  • 7. Nuclear pores Have 100nm diameter. Human cell have 3000-4000 nuclear pores. Help in nuclear transport.
  • 8. Nuclear lamina. Intermediate filaments. Mechanical support. Lamin protein.
  • 9. Chromosomes Genetic material. Heterochromatin- highly condensed. Euchromatin- less condensed.
  • 10. Nucleolus Discrete densely stained structure. Synthesize rRNA and assemble ribosomes. Disappear when cell divide.
  • 11. Functions of Nucleus Storage of hereditary material. Storage of proteins and RNA. Production of ribosomes. Transport of hereditary material to the rest of cell. Prevention.