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Question

Assertion :In a mature plant cell, the nucleus and cell organelles are pushed against the cell wall. Reason: The plant cell have single and large central vacuole which occupies 50-90% of the cell volume.

A
Both assertion and reason are correct and reason is the correct explanation for assertion.
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B
Both assertion and reason are correct but reason is not the correct explanation for assertion.
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C
Assertion is correct but reason is incorrect.
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D
Assertion is incorrect but reason is correct.
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Solution

The correct option is A Both assertion and reason are correct and reason is the correct explanation for assertion.
Plant cells have a cell wall and a large central vacuole. In the mature plant, the central vacuole may occupy 50-90% of the cell interior. It stores amino acids, sugars, water ions, and wastes. The cytoplasm is forced into a very narrow zone between the central vacuole and the plasma membrane. A cell's vacuole can occupy a large proportion of the total volume of the cell, e.g., 90% of the volume of some mature plant cells.

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