Write a note on cell wall in Eukaryotic cells.

• The rigid, protective and supportive covering, outside the cell membrane is called cell wall. It is present in plant cells, fungi and some protists. 
• Algae show presence of cellulose, galactans, mannans and minerals like calcium carbonate in cell wall. 
• In other plants, it is made up of hemicelluloses, pectin, lipids and protein. 
• Microfibrils of plant cell wall show presence of cellulose which is responsible for rigidity.
• Some of the depositions of cell wall are silica (grass stem), cutin (epidermal walls of land plants), suberin (endodermal cells of root), wax, lignin. 

Function: 

• Provides support, rigidity and shape to the cell. 
• Protects the protoplasm against mechanical injury and infections.