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Jonnathan Pineda
What is a Cell?
Make up living things
 Carry out activities that keep them alive

What is a Cell Wall?
Protected layer
 Found on the outside of plasma
membrane
 If you put a balloon in a box, the box
serves a cell wall protecting the balloon

3 Layers
Middle Lamella- first layer formed,
composed of peptic compounds and
protein
 Primary Wall- second layer formed
 Secondary Wall- last layer, is extremely
rigid, provides compression strength

Where is the Cell wall found?
Plants
 bacteria
 Achaea
 fungi
 algae
 Different types of cell wall for each

Cell Wall in Plants, Archaea,,
bacteria,
Plants
 Primary Walls
 Secondary walls
 Archaea
 Composed of a S-Layer and lack
peptidoglycan
o Bacteria
 Composed of disaccharides and amino
acids

What are Cell walls Made of?
Plant cell wall - cellulose
 Bacterial cell wall- peptidoglycan
 Fungi cell wall- chitin and other
polysaccharodes
 Archaea cell wall- isoprenyl ether
 Algae cell wall- cellulose

Its Function?
Gives it a shape
 Protect cell
 Acts as a pressure vessel
 Prevent over expansion when water
enters the cell

Reference

Raven, P., G. Johnson, K. Mason, J.
Losos and S. Singer. 2014. Biology,
10th ed. McGraw-Hill, Boston.