If a membrane protein in an intact erythrocyte reacts with a membrane-impermeable reagent, what can you conclude about the protein? A. It is a transmembrane protein. B. It is a peripheral membrane protein. C. At least one domain of the protein is located on the outer face of the membrane. D. It is not a plasma membrane protein.

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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.