Factors affecting diffusion rates in model cells

Question 1

How would you set up such an experiment and model cell

Answer 1

• Tie one end of a section of dialysis tubing, fill it with a solution (could be starch, glucose etc.) and then tie the other end
• The tubing is then placed into another solution which is where you can add different sizes or concentrations of solutes
• Measure the changes in concentration of solute molecules inside and outside the cell this could be done through carrying out food tests and then using a colorimeter

Question 2

Why use dialysis tubing

Answer 2

Because it is partially permeable and has tiny pores for water to enter through but not for larger solutes just like a cell surface membrane