Question

A freshly plasmolysed cell has
A. Little solute potential
B. maximum turgor pressure
C. Zero turgor pressure
D. Negative turgor pressure

Answer 1

Hint: Plasmolysis is the shrinking of the cell due to the turgor pressure created by the hypertonic solution in the surrounding where the cell is placed. It also depends on the osmotic pressure of the water. With help of this, the tonicity of the cell can be determined.

Complete answer:
Plasmolysis depends on the turgor pressure created and the net flow of water causing osmosis.
When the cell is kept in the hypertonic arrangement, the cell will free water and shrink but why does it happen in such a way?
During plasmolysis turgor weight of the cell diminishes and causes the fluid inside the cell to spill out which occurs due to exosmosis.
Cell wall becomes porous and the cell film pulls from the cell divider.
Plasmolysis cells in hypertonic solution comprises a plasma layer which is made up of phospholipid layer which also becomes porous and lines contracting up.
In plasmolysis turgor weight of cells decreases.
Plasmolysis can be reversible or irreversible depending upon the mechanism uptake.
This results in the negative turgor pressure causing a freshly plasmolyzed cell.

Note: Plasmolysis can be of two types one is the concave plasmolysis in which the cell shrinks half from the cell wall, it is always reversible in nature whereas in convex plasmolysis the cell protoplast and the plasma membrane both shrinks with the cell from the cell wall, it is always irreversible in nature.