Question

question 3
1 pts
you viewed an experiment that used iodine, starch, and dialysis tubing. we found out that certain molecules are too large to cross the cell membrane with passive transport alone. from the experiment, which molecule was too large to cross the membrane of the dialysis tubing?
o starch
o iodine
o water
o food - dye

Explanation:

In dialysis - tubing experiments, starch is a large - sized macromolecule. Iodine, water, and food - dye molecules are relatively small and can pass through the semi - permeable membrane of dialysis tubing by diffusion. Starch cannot cross the membrane due to its large size.

Answer:

A. starch