An experiment was set up to determine the movement of molecules through a dialysis-tubing bag into water. A dialysis-tubing bag containing 5 percent lactose and 5 percent fructose was placed in a beaker of distilled water, as illustrated in the given figure. After 4 h, fructose is detected in the distilled water outside of the
dialysis-tubing bag, but lactose is not.
{Distilled water
Dialysis-tubing bag
with 5% lactose
and 5% fructose}
What conclusions can be made about the movement of molecules in this experiment?