Question : The phospholipids (Indicate the wrong answer) : A- Are principle components of cell membranes. B- Are amphiphilic molecules. C- The hydrophilic part of the molecule is partly formed by a phosphate group. D- The 1-2 diacylglycerol is one of its components. E- Given the fact that the phosphate group of phospholipids is esterified it is never charged at a physiological pH.

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Q: 1. Draw the structure of  phosphatidic acid. Circle the polar parts of the molecule and box the…

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Q: What is a phospholipid?  What is its structure?  Where do you find phospholipids in the body?

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Q: Thinking about cell membranes. a) The fatty acid tails of the phospholipids that make up cell…

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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.