Question 2
Cell and Its EnvironmentFour cells with osmotic potential equivalent to that of 3% salt solution were immersed respectively in solutions of different concentrations labelled as follows: I = 4% salt solution; II = 6% salt solution III = 1% salt solution; IV = 10% salt solution; V = 5% salt solution. Which of the solutions will cause an increase in osmotic pressure within the cell?
- A.I
- B.II
- C.III
- D.IV
- E.V
Show the answer and explanation
Answer: C (III)
Explanation
Only the 1% solution is weaker than the cell sap, so only there does water enter the cell by osmosis and build up pressure inside it; in all the others the cell loses water.