You have genetically modified a cell to have a thicker membrane than normal (25nm).  To keep your cells alive, you need to understand how diffusion of nutrients works. What is the flux of glucose through the cell membrane given that:  -The concentration of glucose in the media is 10mM -The concentration of glucose inside the cell is 2mM -The diffusivity of glucose is 6x10-10m2/s

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Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.