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Plasmolysis in a plant cell is defined as (a) break down (lysis ) of plasma membrane in hypotonic medium (b) shrinkage of cytoplasm in hypertonic medium (c) shrinkage of nucleoplasm (d) none of them

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When the Plant cell is kept in the hypertonic solution, the water moves out of the cell by exosmosis and the cell shrinks. But since the cell wall is rigid in nature, it does not shrink and the cellular content moves away from the cell wall. This process is called plasmolysis.

Hence the correct option is b.

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