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BIO NMDCAT Biological Importance of Water
nmdcat.online June 27, 2026

In a plant cell, a decrease in the water potential of the surrounding solution (making it more negative) compared to the cell sap will result in

A. Turgor pressure reaching its maximum level
B. Net movement of water into the cell, causing deplasmolysis
C. The cell becoming fully turgid and bursting
D. Exosmosis, leading to the shrinkage of the protoplast away from the cell wall
✓

📝 Explanation

Water moves from higher water potential to lower water potential. If the external solution has a lower (more negative) water potential (hypertonic), water leaves the cell by exosmosis. The protoplast shrinks and detaches from the rigid cell wall, a process called plasmolysis.

📖 Additional Information

  • Turgor pressure reaching its maximum level
  • Net movement of water into the cell, causing deplasmolysis
  • The cell becoming fully turgid and bursting
  • Exosmosis, leading to the shrinkage of the protoplast away from the cell wall

Water moves from higher water potential to lower water potential. If the external solution has a lower (more negative) water potential (hypertonic), water leaves the cell by exosmosis. The protoplast shrinks and detaches from the rigid cell wall, a process called plasmolysis.

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