Question

Which of the following statements about plasmolysis is/are true? I .$\quad$ Plasmolysis occurs when water moves into the cell II. $\quad$Cells shrink in hypotonic solutions III.$\quad$ If the external solution balances the osmotic pressure of the cytoplasm,it is said to be isotonic

• A. I only
• B. II only
• C. III only
• D. I and II only

Answer 1

Answer: (C)

III only

Answer 2

Plasmolysis occurs when water moves out of the cell and the cell membrane of a plant cell shrinks away from its cell wall. This occurs when the cell is placed in hypertonic solution (i.e., solution having more concentration of solute than cytoplasm). In plasmolysis, water is first lost from cytoplasm and then from the vacuole and causes the protoplast to shrink away from the walls.