in Cell envelope, Cell membrane, Cell wall by

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The major functions of cell wall are: 

1. The cell wall provides support and mechanical strength to the cells
2. Helps in giving shape to the cells
3. It resists water pressure thereby protecting the cell membrane from bursting. 
4. It acts as a physical barrier to external pathogens
5. It controls the rate and directions of cell growth
6. It serves as a major storage repository for Carbohydrates
7. Plays a key role in Cell signaling 
8. It helps passage of small molecules like proteins to and fro of the cell
9. It helps protect the Plasma Membrane

 

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