SI session Oct. 4 Ch. 7 and 8

SI session Oct. 4 Ch. 7 and 8 - Kaiser Imam October 4, 2007...

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Kaiser Imam October 4, 2007 BIOL 215 SI Session Chapters 7 and 8 Chapter 7:  Membrane Structure and Function  1. List the 5 principal functions of cellular membranes: 1) 2) 3) 4) 5) 2. Describe the components of the fluid mosaic model for membranes. 3. What is an amphipathic molecule? Give an example. 4. What structure do phospholipids spontaneously form in an aqueous solvent? 5. How does the polarity of phospholipids affect their position in membranes? 6. What is the difference between phospholipid bilayers and micelles? 1
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7. List some characteristics of each of the following types of lipids: 1) Phospholipids 2) Glycolipids 3) Sterols 8. Do the fatty acids attached to a phospholipid have to be the same? 9. What is membrane asymmetry? 10. List the three modes of movement of phospholipid molecules within membranes: 1) 2) 3) 11. Why does transverse diffusion occur very rarely in lipid bilayers? 12. What is the difference between saturated and unsaturated fatty acids? 2
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13. What configuration of double bonds is found in unsaturated fatty acids? 14. How do the double bonds of unsaturated fatty acids affect membrane structure? 15. Why is butter solid at room temperature but vegetable oil is not?
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This note was uploaded on 09/29/2009 for the course BIO 215 taught by Professor Diiulio during the Spring '09 term at Case Western.

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SI session Oct. 4 Ch. 7 and 8 - Kaiser Imam October 4, 2007...

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