Question

The movement of solvent molecules into the region of higher solute concentration through semipermeable membrane is called

• A. Imbibition
• B. Diffusion
• C. Osmosis
• D. Plasmolysis

Answer 1

The correct option is C Osmosis

a) The process of adsorption of water by solid particles of a substance without forming a solution is called imbibition. The water potential gradient between the absorbent and the liquid imbibed is essential for imbibition.

b) Diffusion is random movement of molecules from the region of higher concentration to the lower concentration. It allows the gaseous exchange during transpiration from the stomata.

c) Osmosis is the process of diffusion of molecules from the region of higher concentration to the lower concentration through a semipermeable membrane. The cells absorbs water by the process of endosmosis from its surrounding and water exits by the process of exosmosis. On absorption of water the turgor pressure inside the cells increases. It helps to maintain the shape of the cell. It helps in the growth, development, mechanical support and prevents wilting.

d) Plasmolysis is the shrinking of the protoplasm as a result of water loss from osmosis when a cell comes in contact with a hypertonic solution.

So, the correct answer is option C.