Question

During diffusion, when the concentration of the molecules on both sides of a membrane is the same, the molecules will
C. continue to move across the membrane in both directions
D. move across the membrane to the inside of the cell

Answer 1

The molecules will not move/diffuse at all because a concentration gradient of 0 has been reached meaning there is no concentration gradient at all. The molecules will not continue to move across the membrane in both directions nor will they move across the membrane to the inside of the cell. The number of molecules is equal in both sides.