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JAMB Biology 1983 Question 47

Question 47

Cell and Its Environment

When a Spirogyra cell is immersed in a salt solution more concentrated than its cell sap, it

  1. A.remains unchanged
  2. B.takes up water and burst
  3. C.absorbs a little water
  4. D.loses water and shrivels
  5. E.becomes turgid.
Show the answer and explanation

Answer: D (loses water and shrivels)

Explanation

In a more concentrated solution water leaves the cell by osmosis, so the cytoplasm shrinks away from the wall (plasmolysis).