Question

When a cell is plasmolyzed, it becomes
(a) Flaccid and its TP become zero.
(b) Turgid and its TP becomes zero.
(c) Turgid and TP become equal to OP.
(d) Flaccid and DPD become zero.

Answer 1

This is the condition when there develops a gap between the cytoplasm and the cell wall, which is caused because of the process of exosmosis. Also, the absence of pressure is responsible for pushing the plasma membrane against the cell wall.

Complete answer:
When a cell is plasmolyzed, it becomes flaccid and its TP becomes zero. When a cell is placed in a hypertonic solution, the water from the cell moves towards the outside. This causes the shrinkage of the cytoplasm of a living cell from its cell wall due to exosmosis. The entire process is known as plasmolysis and the cell is called a plasmolyzed cell. The plasmolyzed cell becomes flaccid when it loses water and due to this, there is a gap between the cytoplasm and the cell wall. In this condition, the plasmolyzed cell becomes flaccid and the turgor pressure (TP) becomes zero.
-During the process of plasmolysis the cell membrane pulls away from the cell wall.
-Plasmolysis can be used to measure the osmotic pressure of a cell.
-Exosmosis is the process of outflow of water from a cell into the surrounding medium after placing it in a solution whose solute concentration is more than that of the cell sap.
-Plasmolysis can be reversed by placing it in a hypotonic solution.
-Plasmolysis rarely occurs in nature so it is induced in the laboratory by placing the cells in strong saline or sucrose solution to cause exosmosis.
-Plasmolysis is mainly shrinking of the cell membrane in a hypertonic solution and great pressure.

So, the correct answer is,’ Flaccid and its TP becomes zero’.

Note:
-Hypertonic solution: When the osmotic concentration of a solution is more than that of the cell sap or another solution, is known as a hypertonic solution.
-Turgor pressure is a pressure that is responsible for pushing the plasma membrane against the cell wall.
-The cell which has lost water and there is a gap between the cell wall and protoplasm is called a flaccid cell.