Look at the diagram, which shows the process of diffusion. Then, answer the question. The diagram shows the process of diffusion. There are many molecules on the right side of the membrane. There are very few molecules on the left side of the membrane. Public Domain Why will the molecules move from right to left through the cell membrane? Molecules will move from an area of higher concentration to an area of lower concentration. Molecules will move from an area of lower concentration to an area of higher concentration. Molecules will move in the opposite direction from the flow of cytoplasm. Molecules will move in the same direction as the flow of cytoplasm.