. Working as an engineer in the R&D section of a biotech industry, you are asked to select a membrane to concentrate a solution containing a protein with a molecular weight of 200 kDa; Fortunately, it has three types of membrane in the cellar: one for MF, one for UF and one for RO. Which one would you choose to perform the required service? Could you establish some characteristics of the chosen membrane

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A:

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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.