. What is the function of a cell wall

Best Answer


  • A cell wall is the non-living component that protects the cell's outer layer. It has a permeable nature and varies in composition depending on the organism.
  •  The cell wall separates the cell's inside contents from the outside world. It also gives the cell and its organelles structure, support, and protection. 
  • This cellular component, on the other hand, is found only in eukaryotic plants, fungi, and a few prokaryotic organisms.

Final Answer: The functions of cell walls are:

  1. It maintains the shape of the cells
  2. It protects the cells from mechanical injury.
  3. It wards off the attack of pathogens.
  4. It provides mechanical support against gravity. It is due to the rigid cell walls that the aerial parts of the plants are able to keep erect and expose their leaves to sunlight.
  5. It prevents undue expansion of the cell when water enters by osmosis to compensate for the lack of vacuoles . This prevents bursting of cells.
  6. It allows the materials to pass in and out of the cell
  7. Many enzymatic activities associated with metabolism are known to occur in the cell wall.
  8. Cutin and suberin deposits check loss of water from the cell surface by evaporation.
  9. The cell wall helps in maintenance of balance of intracellular osmotic pressure with that of its surroundings.
  10. Pores in the cell wall permit plasmodesmata to link up all the protoplasts into a system called symplast.
  11. The wall in some cases has a role in defense and offense by means of spines.
  12.  Growth of the cell wall enables the cells to enlarge in size.



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