BIO 202 Lecture 11: BIO 202 Lec 11-15

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Lecture 11: describe a typical plasma membrane. Plasma membrane is composed of phospholipid and protein, which often contain carbohydrates. Molecules of plasma membrane are often amphipathic. It separates the living cell from its surroundings and is selectively permeable. Fatty acids, saturated and unsaturated hydrophobic region of the molecule. Hydrophilic region of the molecule, many types of polar molecules. Sidedness of the plasma membrane: molecules on the inside surface of the er, golgi, and vesicles end up on the outside surface of the cells. The extracellular face of the plasma membrane is topologically equivalent to the inside face of the er, golgi, and vesicle membranes: define and give examples of an amphipathic molecule. Having both hydrophobic and hydrophilic regions (phospholipids, amino acids, membrane proteins) Hydrophobic bonding stabilizes the lipid bilayer: name and recognize the structures of several phospholipids. Integral membrane proteins are held tightly in a membrane and can only be removed by treatments that disrupt the lipid bilayer.

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