Showing posts with label Cell wall. Show all posts
Showing posts with label Cell wall. Show all posts

Wednesday, 27 February 2019

Cell wall

Cell wall

Definition

Cell wall is the outermost layer of plant cell which protect inner cell mass from external environment.

Presence

Cell wall is present in all bacteria, plants fungi and  some protests.

Absence

Cell wall is absent in animal cell.

Location

Cell wall is located outside the plasma membrane in plant cell.
Thickness of cell wall  varies  From cell to cell.

Primary wall

The outer layer of the plant cell wall is know  as secondary wall. It Is made of cellulose.

Secondary cell wall

Some plant cell also have secondary walls on the inner side of primary wall.
It contain cellulose, liginn,and other chemical's.

Composition of different organism cell wall

Prokaryotic 

cell wall is composed of peptidoglycan(murein).
Its is single large molecule made of amino acid and suger.

Fungi cell wall

The cell wall.of fungi made of chitin.

Protists

The cell wall of protists are made of a variety of chemicals.

Function

Its provide shape
Its function is protection the cell from external environment
Cell wall support the inner living matter of cell