Question

Endosmosis of water occurs, when in comparison with the outer solution the water potential of cell sap is

• A. Higher
• B. Lower
• C. Equal
• D. None of the above

Answer 1

Answer: (B)

Lower

Osmosis is defined as the flow of water along concentration gradient through semi-permeable membrane. When water enters into a cell the process is called as endosmosis and when the cell loses water due to osmosis, the process is called as exosmosis.

In a plant body, water always moves from a region of higher water potential to a region of lower water potential. Consequently, for endosmosis to occur the water potential inside the cell should be lower than water potential in its surroundings.

Thus, the correct answer is option B.