Problemset 2 - Problem Set 2 1. Draw a cartoon of the lipid...

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Problem Set 2 1. Draw a cartoon of the lipid core of the plasma membrane. Label its amphipathic parts. What are some of the properties of this part of the membrane. Add to your drawing the types of proteins found in the membrane; clearly indicate that you understand their spatial relationship to the lipid bilayer. Membrane lipids from the core structure of membranes. Phospholipids are the most abundant.The provide barrier to prevent water soluble substances from entering and leaving the cell. Contains variety of membrane proteins such as transporters, anchors, receptors and enzymes. They can be transmembrane, membrane associated, lipid linked or protein attached. Hydrophilic O----- Hydrophilic O----- 2. With regard to #1, why in the intact cell do water molecules form a ‘cage-like structure’ around the hydrophobic component? What is the basis for the formation of the cage? Why don’t the lipid molecules form bonds with each other? Phospholipid bilayers sponntaneously close in on themselves to form sealed compartments. The closed structure is stable because it avoids the exposure of the hydrophobic hydrocarbon tails to water, which would be energitically unfavorable. 3. Transmembrane proteins are extremely important in membrane function. What are the component parts (regions) of a transmembrane protein. Why does the transmembrane
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This note was uploaded on 05/22/2008 for the course CELL BIO & 270 taught by Professor Hart during the Spring '08 term at Rutgers.

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Problemset 2 - Problem Set 2 1. Draw a cartoon of the lipid...

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