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(6)
1)They are involved in synthesis of cell wall,plasma membrane and lysosomes.
2)It produces vacuoles which contain cellular secretions eg:enzymes,protein,cellulose etc.
3)They act as an area for storage,processing and packaging of various cellular secretions.
(7) The plasma membrane is called a selectively permeable membrane as it permits the movement of only certain molecules in and out of the cells. If plasma membrane ruptures or breaks down then molecules of some substances will freely move in and out of the cells.
(8) If the medium surrounding the cell is of exactly the same water concentration as inside the cell, there will be no net movement of water across membrane resulting in no change in size of cell. Such solution is called Isotonic solution.
(9) Plasmolysis is defined as the process of contraction or shrinkage of the protoplasm of a plant cell and is caused due to the loss of water in the cell. Plasmolysis is an example of the results of osmosis and rarely occurs in nature.
1)They are involved in synthesis of cell wall,plasma membrane and lysosomes.
2)It produces vacuoles which contain cellular secretions eg:enzymes,protein,cellulose etc.
3)They act as an area for storage,processing and packaging of various cellular secretions.
(7) The plasma membrane is called a selectively permeable membrane as it permits the movement of only certain molecules in and out of the cells. If plasma membrane ruptures or breaks down then molecules of some substances will freely move in and out of the cells.
(8) If the medium surrounding the cell is of exactly the same water concentration as inside the cell, there will be no net movement of water across membrane resulting in no change in size of cell. Such solution is called Isotonic solution.
(9) Plasmolysis is defined as the process of contraction or shrinkage of the protoplasm of a plant cell and is caused due to the loss of water in the cell. Plasmolysis is an example of the results of osmosis and rarely occurs in nature.