Bacteria 1 Ribosome Cytoplasm Nucleoid Glycocalyx Cell wall Cytoplasmic membrane Flagellum Inclusions Prokaryotic Cell Structure Chapters 3 and 11 Eukaryotic cell structure -- you should review from Biol 131 Archeal cell structure – not much different than Bacteria Bacterial Classification -- you are not responsible for the details presented in Chapter 11, but should read about different types of bacteria presented in class We will be discussing
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Bacteria 1
Ribosome
CytoplasmNucleoid
GlycocalyxCell wall
Cytoplasmic membrane
Flagellum
Inclusions
Prokaryotic Cell Structure
Chapters 3 and 11
Eukaryotic cell structure-- you should review from Biol 131
Archeal cell structure – not much different than Bacteria
Bacterial Classification-- you are not responsible for the details presented in Chapter 11, but should read about different types of bacteria presented in class
We will be discussing classification again as part of bacterial metabolism
Bacteria 2
Why are bacteria so small?Size affects ‘surface to volume’ ratio
Advantages of large S/V:diffusion ratesmetabolic ratesreproductive rates
Limits to size reduction?‘defective’ bacteria
Really big bacteria?-- Epulopiscium fishelsoni
Epulopiscium web sitehttp://www.micro.cornell.edu/cals/micro/research/labs/angert-lab/epulopiscium.cfm
Bacteria 3
Classification of bacteria is ‘murky’
A “Muddle in the Middle”Few distinctive characteristicsGenetically promiscuous
-- “horizontal” gene transfer
Traditional classification:anatomical featuresstaining characteristicsmetabolic properties
Newer approach
Genetic analysis
Bergey’s manual is the ‘Bible’
Bacteria 4
Classification based upon anatomical features
3 common shapes
-- coupled with staining propertiese.g., “Gram-pos cocci”“Gram-neg bacilli”
Some unusual shapes also:
Bacteria 5
Classification based upon anatomical features -- more info about these is in Chap 11