Question

The diffusion of water from an external solution into dry raisins is called

• A. exosmosis
• B. endosmosis
• C. imbibition
• D. plasmolysis

Answer 1

The correct option is B

endosmosis

The correct option is B

Explanation of the correct option:

1. Endosmosis is the process of the movement of water molecules into the cell when put in a hypotonic solution.
2. If a cell is placed in a hypotonic solution, the cell will swell up due to water osmotically moving inside.
3. A hypotonic solution is one that has a higher solute concentration inside the cell than outside.
4. The raisins when introduced into water will start absorbing water by Imbibition. Thus, the raisins will become swollen.
5. The entry of water into a cell is called endosmosis, movement of water outside the cell is called exosmosis.

Explanation of the incorrect option:

Option A:

1. The movement of water outside the cell is called exosmosis.

Option C:

1. Imbibition is a type of diffusion where the water is absorbed by the solid particles called colloids, (plants, seeds) causing an enormous increase in volume.

Option D:

1. Plasmolysis is the process of shrinkage of the protoplasm of a plant cell.
2. It is caused due to the loss of water in the cell.
3. Plasmolysis is an example of the results of osmosis and rarely occurs in nature.

Final answer: The diffusion of water from an external solution into dry raisins is called endosmosis.