Answer: If the concentration of glucose inside the cell is higher than the one outside the cell, glucose molecules will move from inside the cell to the outside of the cell in a process of diffusion.
Explanation: Diffusion is the movement of solute molecules from a region of higher concentration to a region of lower concentration. The inside of the cell has higher glucose concentration i.e., has higher quantity of glucose molecules than outside of the cell which has a lower glucose concentration, therefore glucose molecules will move from inside the cell to outside the cell. The purpose of this is to create a balance in glucose concentrations in the two environments.
It is logical because the balloon lets the student see how much gas is released in the reaction. the balloon inflates with invisible air the student will normally not see.