Question

1. Multiple choice questions: Plasmolysis in a plant cell is defined as
(a) Breakdown (lysis) of plasma membrane in hypotonic medium
(6) Shrinkage of cytoplasm in hypertonic medium
(c) Shrinkage of nucleoplasm
(d) None of them​

Answer 1

Answer:

Breakdown (lysis)of plasma membrane in hypotonic medium

Answer 2

The correct answer for this question is option b, Shrinkage of cytoplasm in a hypertonic medium.

• Plasmolysis is defined as the shrinking of cytoplasm away from the plant cell wall due to exosmosis.
• Hypertonic solution is a solution having the highest concentration of solutes than water molecules.
• When a plant cell is placed in a hypertonic medium, the water inside the cells moves from a region of higher concentration to a lower concentration and results in the shrinkage of the cytoplasm and such cells are said to be flaccid cells.
• Plasmolysis is thus one of the results of osmosis and is also a reversible process achieved by keeping in a hypotonic solution.
• eg. Microbes gets plasmolysed when a higher concentration of salt is used in pickles.