Use the Diagram of the U-Tube in Figure 7

question 37

Multiple Choice

Use the diagram of the U-tube in Figure 7.2 to answer the questions that follow.
The solutions in the two arms of this U-tube are separated by a membrane that is permeable to water and glucose but not to sucrose. Side A is half filled with a solution of 2 M sucrose and 1 M glucose. Side B is half filled with 1 M sucrose and 2 M glucose. Initially, the liquid levels on both sides are equal.


-Celery stalks that are immersed in fresh water for several hours become stiff and hard. Similar stalks left in a salt solution become limp and soft. From this we can deduce that the cells of the celery stalks are

• A)hypotonic to both fresh water and the salt solution.
• B)hypertonic to both fresh water and the salt solution.
• C)hypertonic to fresh water but hypotonic to the salt solution.
• D)hypotonic to fresh water but hypertonic to the salt solution.
• E)isotonic with fresh water but hypotonic to the salt solution.

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