The Fundamental of Life – Structure of Cell

The Fundamental of Life – Structure of Cell - 9th Class science

Nucleus:

Nucleus is dense and spherical organelle.

The nucleus is bounded by two membranes, both forming nuclear envelope. Nuclear envelope contains many pores known as nuclear pores.

The fluid which presents inside the nucleus is called nucleoplasm.

The nucleus contains chromosomes and chromosomes contain genes which are the centers of genetic information.

Functions:

The nucleus controls all the metabolic activities of the cell.
It regulates the cell cycle.
The nucleus is the storehouse of genes.It is concerned with the transmission of hereditary traits from the parent to offspring.

Cytoplasm:

It is a jelly-like, viscous, colorless semi-fluid substance that occurs between the plasma membrane and the nuclear membrane.

The aqueous ground substance of cytoplasm is called cytosol that contains a variety of cell organelles and other insoluble waste products and storage products, like starch, glycogen, lipid, etc.

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