The space between plasma membrane and cell wall of plasmolyzed cell is occupied by hypertonic solution.

Introduction:
When a plant cell is placed in a hypotonic solution, which has a lower solute concentration than the cell's cytoplasm, water enters the cell through osmosis. This influx of water causes the cell to swell and the plasma membrane to push against the rigid cell wall. In certain cases, the cell may undergo plasmolysis, where the plasma membrane detaches from the cell wall due to excessive water loss. In this condition, the space between the plasma membrane and the cell wall is occupied by a solution.

Answer:
The space between the plasma membrane and the cell wall of a plasmolysed cell surrounded by a hypotonic solution is occupied by a hypertonic solution. Let's understand the reasons behind this:

Osmotic pressure:
Plasmolysis occurs when a plant cell loses water and the protoplast shrinks away from the cell wall. During this process, the osmotic pressure inside the cell decreases. The hypotonic solution surrounding the cell has a higher solute concentration compared to the cell's cytoplasm. As a result, water moves out of the cell, causing it to shrink and the plasma membrane to detach from the cell wall.

Hypertonic solution formation:
As water moves out of the cell, the solute concentration inside the cell increases. Eventually, the solute concentration becomes higher than that of the hypotonic solution surrounding the cell. This results in the formation of a hypertonic solution in the space between the plasma membrane and the cell wall.

Water movement:
Since the concentration of solutes in the hypertonic solution is higher than that of the hypotonic solution, water molecules tend to move from areas of lower solute concentration to higher solute concentration. In this case, water will move from the hypotonic solution into the space occupied by the hypertonic solution between the plasma membrane and the cell wall.

Explanation:
In summary, when a plasmolysed cell is surrounded by a hypotonic solution, the space between the plasma membrane and the cell wall is occupied by a hypertonic solution. This is because water moves out of the cell, causing the solute concentration inside the cell to increase. The higher solute concentration in the cell creates a hypertonic environment, leading to the movement of water from the hypotonic solution into the space between the plasma membrane and the cell wall.

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