NABTEB Biology 2025 Objective — Question 7
Question 7 of 50 from the National Business and Technical Examinations Board (NABTEB) Biology 2025 Objective paper, with the correct answer and a full explanation.
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Four cells each with osmotic potential of about 3% salt solution were immersed respectively into solutions of different concentrations as follows: I - 1% salt solution; II - 3% salt solution; III - 6% salt solution; IV - 10% salt solution. Use the information above to answer this question and the next. Which of the solutions would cause an increase in osmotic pressure within the cell?
- A. ICorrect
- B. II
- C. III
- D. IV
Explanation
When placed in a lower concentration solution (like 1% salt solution), water will move into the cells due to osmosis, causing an increase in osmotic pressure within the cell, since the 1% salt solution has a lower concentration than the cell.
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