The barrier between the protoplasm and outer environment in a plant cell is
A
Cell membrane
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B
Nuclear membrane
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C
Cell wall
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D
Tonoplast
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Solution
The correct option is A Cell membrane The cell membrane is the outer covering of all cell but in the plant cell, it is present below the cell wall and separates the cell content or protoplasm from surroundings. It is the thin layer of protein and fat. The cell membrane is semipermeable, allowing some substances to pass into the cell and blocking others.