Refer to an experiment in which a dialysis-tubing bag is filled with a mixture of 3% starch and 3% glucose and placed in a beaker of distilled water, as shown below. After 3 hours, glucose can be detected in the water outside the dialysis-tubing bag, but starch cannot.
(A) It would gain mass.
(B) It would neither gain nor lose mass.
(C) It would absorb solutes from the surrounding liquid.
(D) It would lose water until water potential inside the cells is equal to zero.
(E) The cells of the potato would increase their metabolic activity.
Answer: A
If, instead of the bag, a potato slice were placed in the beaker of distilled water, which of the following would be true of the potato slice?
(A) It would gain mass.
(B) It would neither gain nor lose mass.
(C) It would absorb solutes from the surrounding liquid.
(D) It would lose water until water potential inside the cells is equal to zero.
(E) The cells of the potato would increase their metabolic activity.
Answer: A