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Biology Coursework: Osmosis Investigation The aim of this experiment is to investigate the movement of water into and out of plant cells by osmosis, under different concentrations of sucrose. The cells chosen for study will be taken from potato strips as they provide a good supply of perfect plant material. Plant cells always have a strong cell wall surrounding them. When the take up water by osmosis they start to swell, but the cell wall prevents them from bursting. Plant cells become "turgid" when they are put in dilute solutions. Turgid means swollen and hard. The pressure inside the cell rises; eventually the internal pressure of the cell is so high that no more water can enter the cell. This pressure works against osmosis, and this is why turgidity is very important to plants. When plant cells are placed in concentrated sugar solutions they lose water by osmosis and they...

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