Question

question 1. if starch (solute) cannot move through a membrane, which observation would most likely be made 24 hours later? a. the mass of the \model cell\ has increased b. the amount of distilled water in the beaker has increased c. the \model cell\ has become smaller d. the contents of the \model cell\ have changed color model cell starch solution dialysis tubing

Explanation:

Starch is a large - sized molecule and cannot pass through a semi - permeable membrane in dialysis tubing. Water, being a small molecule, can move by osmosis from an area of lower solute concentration (distilled water in the beaker) to an area of higher solute concentration (inside the model cell with starch solution). This will cause the model cell to gain water and increase in mass.

Answer:

A. The mass of the "model cell" has increased