Your lab group is experimenting with the diffusion of molecules across a membrane. Dialysis tubing is used as a model cell membrane, because is it semi-permeable, allowing small molecules to cross the membrane, but NOT larger molecules, like starch. A
starch solution is placed in the dialysis tubing and then the dialysis tubing is placed in an iodine and water solution, lodine is used as
an indicator for the presence of starch. Normally, iodine is a yellow-brown color, but in the presence of starch, it turns a deep purple.
After observing the experimental setup for 20 minutes, the iodine solution remains brown, but the starch solution inside the dialysis
tubing is purple and swollen. Based on what you learned from the lab, starch is MOST likely to cross the cell membrane at which of
the points indicated on the diagram?