7. Short answer. Professor Forni has hired you as a research assistant and you need to make an X-gal staining solution for your sections containing 5mM potassium ferrocyanide, 5 mM potassium ferricyanide, 2 MM MgCls, 0.1% Tween and 0.1% BCIP. You need 50 ml. As you are getting ready you discover that your colleague has used most of the BCIP and you only have 150 ul of the BCIP left. Is it enough? Show your calculations. Short answer Profeccor Sai

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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.