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JAMB Biology 2008 Objective — Question 19

Question 19 of 50 from the Joint Admissions and Matriculation Board (JAMB) Biology 2008 Objective paper, with the correct answer and a full explanation.

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Concentrated salt solution is

  • A. isotonic to the content of the cytoplasm of the cells in pawpaw X
  • B. hypertonic to the content of the cytoplasm of the cells in pawpaw XCorrect
  • C. hypotonic to the content of the cytoplasm of the cells in pawpaw Y
  • D. equal to the content of the cytoplasm

Explanation

Concentrated salt solution is hypertonic to the content of the cytoplasm of the cells in pawpaw X. This causes the outflow of water from the pawpaw. Distilled water, on the other hand, is hypotonic to the content of the cytoplasm of the cells in pawpaw Y. This causes the in-flow of water into the pawpaw. Summarily, the two events cause X to become progressively flaccid while Y becomes turgid.

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