Question

During plasmolysis, ________.

• A. there is movement of water across the membrane from an area of higher water potential to lower water potential
• B. there is movement of water across the membrane from an area of lower water potential to higher water potential
• C. water moves inside the cell until equilibrium is reached
• D. neither endosmosis nor exosmosis occurs

Answer 1

The correct option is A there is movement of water across the membrane from an area of higher water potential to lower water potential

When cells are placed in hypertonic solution (has more solutes), exosmosis occurs and water moves out of the cell. This happens because the water potential of cell is higher than the water potential of the sorrounding hypertonic solution. Water always moves from a region of higher water potential to lower potential. Due to exosmosis, the protoplasm shrinks and the cell is said to be plasmolysed.