Question

unit 1.4 cell transport, homeostasis, feedback quiz 2025
the internal solute concentration of a plant cell is about 0.8 %. to demonstrate plasmolysis, it would be necessary to suspend the cell in what solution?
○ 1.0 %
○ 0.8%
○ distilled water
○ 0.4%

Explanation:

Plasmolysis occurs when a plant cell is in a hypertonic solution (higher solute concentration outside the cell, causing water to leave the cell). The internal solute concentration of the plant cell is 0.8%. To cause plasmolysis, the external solution must have a higher solute concentration than 0.8%. Among the options, 1.0% has a higher solute concentration than 0.8%, so immersing the cell in 1.0% solution will cause plasmolysis. 0.8% is isotonic (no net water movement), distilled water is hypotonic (cell would swell), and 0.4% is hypotonic.

Answer:

A. 1.0%