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Investigation to determine the lowest concentration of lead ions that causes cell membranes to lose partial permeability
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Investigation to determine the lowest concentration of lead ions that causes cell membranes to lose partial permeability Knowledge Plasmolysis is the separation of plant cell cytoplasm from the cell wall as a result of water loss. As moisture leaves the vacuole the total volume of the cytoplasm decreases while the cell itself, being rigid, hardly changes. Plasmolysis is unlikely to occur in the wild except in severe conditions. Plasmolysis is induced in the laboratory by immersing a plant cell in a strongly saline or sugary solution, so that water is lost by osmosis. If a cell of almost any water plant is soaked in a 15% sugar solution, its cell contents soon separate from the wall and form a mass in the centre of the cell. This occurs because the sugar solution that has passed freely through the cell wall now encounters a selective semi-permeable cell membrane. The large vacuole in the...
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