A plant cell is placed in a solution and it shrinks from water loss. In what type of environment was the cell placed?
Hypertonic.
Plasmolytic.
Hypotonic.
Isosmotic.
Correct Answer : A
When a plant cell is placed in a hypertonic solution, the solution outside the cell has a higher solute concentration than the cytoplasm inside the cell. As a result, water molecules move out of the cell by osmosis, causing the cell to shrink or shrivel due to loss of turgor pressure. In a hypertonic environment, the osmotic pressure of the solution exceeds that of the cytoplasm, leading to a net movement of water molecules from inside the cell to the surrounding solution. This results in dehydration of the cell and a decrease in cell volume. Plant cells rely on turgor pressure, generated by the influx of water into the cell, to maintain their structural integrity and support. When placed in a hypertonic environment, the loss of water causes the cell membrane to detach from the cell wall, leading to wilting and potential damage to the cell. Therefore, a plant cell that shrinks from water loss when placed in a solution is experiencing a hypertonic environment.
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