Permanent vacuole

• What is the structure of the vacuole?

  Permanent cell vacuoles are permanent pockets of cell sap, a solution of sugars, salts and water.
• What is the function of the vacuole?(pressure)

  The permanent cell vacuole maintains osmotic pressure inside the cell. This ensures that plant cells remain turgid, which stops the plant wilting.
• What is the other function of the vacuole?(storage)

  Cell vacuoles are also important for storing unwanted chemicals that are discarded by the cell.
• What is the membrane that surrounds it called?

  tonoplast