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What is Nucleus of Cell
It is center part of cells.
It is spherical in shape
It has different parts like
- Nuclear Membrane
- Nucleolus and
- Chromosomes
Different Parts of Nucleus
It has different parts like
Nuclear Membrane
It is outer skin or layer of nucleus
It separates nucleus from the Cytoplasm
This membrane is also porous and allows movement of material between the cytoplasm and inside the nucleus
Some cells do not have it which is called Eukaryotic cells
Cells which have it are called Prokaryotic Cells
Nucleolus
It is small spherical body inside nucleus
Its function we will study in higher classes
Chromosomes
They are thread like structures
They carry genes which transfer character from parents to offsprings
What are genes
Unit of inheritance in a living body is known as Genes
It controls the transfer of hereditary characteristics from parents to offsprings
Do All Nucleus have Nuclear Membrane?
No
Some cells have nuclear materials but no membrane
They are called prokaryotic cells
And the organisms with such cells are known as Prokaryotes
Cells having an organized nucleus and a nuclear membrane are known as Eukaryotic cells .
And the organisms other than Bacteria and Blue Green Al gae such cells are known as Eukaryotes .
Questions
NCERT Question 7 - Where are chromosomes found in a cell? State their function.
NCERT Question 3 - Write short notes on the following:
(b) Nucleus of a cell
