Question

What happens during endosmosis? Choose the correct answer from the following.

• A. Water molecules diffuse from lower water potential to higher water potential.
• B. Water molecules diffuse from higher water potential to lower water potential.
• C. Water molecules move from a solution towards pure water.
• D. Water molecules move from cell towards its exterior.

Answer 1

Answer: (B)

Water molecules diffuse from higher water potential to lower water potential.

The inward flow of liquid through the semi-permeable membrane of a cell is called endosmosis.
Raisins, dry grapes when soaked in water overnight become plump due to endosmosis. This happens because water has a lower concentration as compared to the raisins which have a higher concentration.
Or in other words, the water gets diffused from a higher water potential (surrounding) to lower water potential (raisins).
Thus, the correct answer is option (B).