4. a. Draw the structure of the dipeptide Valine-Serine at its isoelectric point. The side chain for valine is CHỊCH), and the sidechain for serine is CH,OH. b. What is the strongest interaction that could occur between the side chains of valine and serine? c. What is the strongest interaction that could occur between the side chains of TWO serines?

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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.