311C F09 Worksheet_6+A

311C F09 Worksheet_6+A - NAME _ Discussion Worksheet #6...

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NAME ____________________ Bio 311C Discussion Worksheet #6 1a. Describe the Fluid Mosaic Model of membrane structure. Membrane is fluid – not static due to the phospholipid bilayer (fluidity depends on hydrocarbon tails of phospholipids). Membrane is a mosaic of different components. The variety of proteins in the membrane adds most to the mosaic nature. 1b. Compare integral membrane proteins and peripheral membrane proteins. Integral membrane proteins penetrate the hydrophobic core of the lipid bilayer (break the surface). Peripheral membrane proteins are attached to the surface of the membrane (not embedded within it). 2. What is the main function of membrane glycoproteins and glycolipids ? On which side of the plasma membrane are you most likely to find such molecules? Cell-cell recognition. Typically found on the extracellular side of the plasma membrane. 3a. What does it mean for a substance to “diffuse down its concentration gradient?” Substance moves from region of higher concentration to region of lower concentration. 3b. Can a substance diffuse against its concentration gradient?
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This note was uploaded on 11/01/2009 for the course BIO 311C taught by Professor Satasivian during the Fall '08 term at University of Texas.

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311C F09 Worksheet_6+A - NAME _ Discussion Worksheet #6...

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