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Question

The membrane covering the vacuole is called

A
cell membrane
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B
tonoplast
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C
plasmalemma
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D
cell wall
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Solution

The correct option is B tonoplast
Vacuole is a membrane-bound space found in the cytoplasm. It occupies 90% of space in a plant cell. It contains water, sap, excretory products and other materials (not useful to cells). It is covered by a membrane called the tonoplast. It is absent in an animal cell, if present, fewer and smaller.

Plasmalemma or the cell membrane is the outermost layer in animal cells and is the second layer lying inner to the cell wall in plant cells. It is selectively permeable in nature.

The cell wall is the outer layer of the plant cell and is absent in animal cells. It is completely permeable in nature.

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