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Osmosis and tonicity

Biology • Cell Membrane & Transport • Knowledge-Based • 1 questions

Osmosis and tonicity Knowledge-Based Download PDF

Biology · Cell Structure & Function · Biology · Cell Membrane & Transport

1 Biology practice questions on Osmosis and tonicity. Questions that assess core concepts and understanding.

Questions

  1. 1.

    When a healthy plant cell with normal turgor pressure is placed into a hypertonic sucrose solution, which of the following events directly occurs as water moves across the cell membrane?

    • A) Water exits the cell down its concentration gradient, causing the plasma membrane to pull away from the cell wall in a process called plasmolysis.
    • B) Water continuously enters the cell until excessive internal osmotic pressure causes the rigid cell wall to rupture and lyse.
    • C) Sucrose molecules rapidly diffuse into the central vacuole down their gradient, maintaining cell volume without any net movement of water.
    • D) Aquaporins close completely to prevent any water flow, locking the protoplast firmly against the cell wall in a state of permanent turgidity.