L5 Bacterial StructureFunction1

L5 Bacterial StructureFunction1 - Bacterial Structure and...

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1 Bacterial Structure and Function 1 Topics (The External Structures) • Small is Beautiful (and efficient) • Microbial shapes and sizes • The Cell Wall • Capsules, Slime and S-layers
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2 The Important (Exam) Stuff • Describe the range of sizes of bacteria and the importance of being small. • Explain how different bacterial shapes are often included in bacterial names. • Describe the basic structure of peptidoglycan. • Explain the major structural differences between the cell walls of Gram-negative and Gram-positive bacteria. • Describe different flagella distribution patterns. • Explain the difference between fimbriae and pili as well as the difference between capsule, slime and S- layers. The Importance of Being Small r=1 μm surface area = 4 π r 2 =12.6 μm 2 volume = 1/3 π r 2 = 4.2 μm 3 surface/volume = 3 r=2 μm surface area = 4 π r 2 =50.3 μm 2 volume = 1/3 π r 2 = 33.5 μm 3 surface/volume = 1.5
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This note was uploaded on 05/26/2008 for the course MB 351 taught by Professor Keen during the Spring '08 term at N.C. State.

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L5 Bacterial StructureFunction1 - Bacterial Structure and...

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