BASIC INFORMATION

1. THE CELL NUCLEUS
(BASIC)
 Presented By: Hina Amir.

2. The Cell Nucleus
Introduction
Cell is a fundamental component of life containing
different organelles.
Nucleus ―A cell organelle.
It is known as nerve center or control center of cell.

4. Size And Shape
 It is a spherical organelle.
 Accounts 10 of cell’s volume.
 It ranges from 2-5 micron meter in
diameter.

5. 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.

6. Structure Of Nucleus
 Nuclear membrane.
 Nuclear pores.
 Nuclear lamina.
 Chromosomes.
 Nucleolus.

8. Nuclear membrane
 It is two layered.
 With 10-50nm separation.
 Prevent genetic material.
 Form nuclear pores.

9. Nuclear pores
 Have 100nm diameter.
 Human cell have 3000-4000 nuclear pores.
 Help in nuclear transport.

10. Nuclear lamina.
 Intermediate filaments.
 Mechanical support.
 Lamin protein.

11. Chromosomes
 Genetic material.
 Heterochromatin- highly condensed.
 Euchromatin- less condensed.

12. Nucleolus
 Discrete densely stained structure.
 Synthesize rRNA and assemble ribosomes.
 Disappear when cell divide.

13. 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.