BB lecture 9-15-08 membrane structure

BB lecture 9-15-08 membrane structure - Test 1 When Monday...

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Test 1 When – Monday 9/22/08, a week from today Time – 6:00-7:30 pm Where – UTC 2.112A (University Teaching Center) UTC is near the Perry-Castaneda Library on South side of campus
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CLASSES BIOLOGICAL ROLE carbohydrates (C,H,O) structure & energy (4C/g) fats (lipids) (C,H,O) structure & energy (9C/g) -waxes (C,H,O) protection, sealant - phospholipids (CHO-P) membrane structure - steroids/sterols membrane structure , hormones Review of Carbohydrates & Lipids : Classes and general functions
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Chapter 7 (pp.125-128): Membrane structure Learning objectives: • Understand the importance of plasma membranes’ function as cell boundaries • Describe the “fluid mosaic model” of a membrane, and realize that although the basic construction is similar, there is variation per function • Explain how the presence of cholesterol and the degree of unsaturated fatty acid chains in phospholipids influence the fluidity of a membrane • Distinguish between peripheral and integral proteins; between channel and carrier proteins Be able to draw a cross-sectional view of a plasma (aka ‘cell’) membrane showing the basic structure and essential components
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Freeze-fracture studies of the plasma membrane Figure 7.4 A cell is frozen and fractured with a knife. The fracture plane often follows the hydrophobic interior of a membrane, splitting the phospholipid bilayer into two separated layers. The membrane proteins go wholly with one of the layers. Extracellular layer Cytoplasmic layer APPLICATION A cell membrane can be split into its two layers, revealing the ultrastructure of the membrane’s interior. TECHNIQUE
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This note was uploaded on 02/24/2010 for the course BIO 311 C taught by Professor Mcclelland during the Spring '09 term at University of Texas at Austin.

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BB lecture 9-15-08 membrane structure - Test 1 When Monday...

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