Chapter3CellEnvelope2 - Lecture 5 - Structures Cell...

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Lecture 5 - Structures Cell Envelope
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Learning Objectives Describe the modern model of a biological membrane. Contrast how small and large, hydrophobic and hydrophilic compounds cross the membrane bilayer Explain why some cells placed in a hypoosmotic environment lyse, and why bacteria do not lyse. Explain why most cells placed in hyperosmotic environment plasmolyze, and how some bacteria avoid plasmolysis. Describe the two components of the proton motive force (PMF). Explain two ways in which cells can produce a proton gradient. List three direct uses of the PMF. Explain the basic differences between Gram negative, Gram positive, Mycobacterial, Mycoplasmal and Archaeal cell walls. Recognize the structural components of peptidoglycan, and how they are assembled. Know how the antibiotics vancomycin, penicillin and lysozyme alter the bacterial cell wall. Be able to label the diagrams of Gram+ (slide 14), Gram- (slide 15) and mycobacterial (slide 17) cell walls. Describe the unique, 3-tiered structure of lipopolysaccharide (Lipid A + core polysacc. + O-antigen).
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This note was uploaded on 02/11/2011 for the course BIO 221 taught by Professor Walter during the Spring '10 term at Purdue.

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Chapter3CellEnvelope2 - Lecture 5 - Structures Cell...

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