When pharmacology researchers design drugs that must enter into cells in order to be effective, they often add functional groups to the drug to make it more likely to pass through the plasma membrane. The addition of which of the following functional groups would be most likely to increase the permeability of a drug across a membrane? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Amino. Carboxyl. Hydroxyl. d Methyl. e Phosphate.

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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.