Chapter 27 - Prokaryotes Notes

Chapter 27 - Prokaryotes Notes - AP BIOLOGY UNIT 9...

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AP B IOLOGY U NIT 9 Page 1 of 3 Knight/Prokaryotes Outline (ch. 27) P ROKARYOTES AND THE O RIGINS OF M ETABOLIC D IVERSITY C H . 27 1) Phylogeny of prokaryotes. a) Domain Archae (Archaebacteria) i) Lack peptidoglycan in c.w. ii) More than one RNA poly-ase iii) Histones assoc. with DNA. iv) Introns in some genes v) Ex. Halophiles, thermoacidophiles, methanogens (1) Methanogens : form CH 4 from H 2 and CO 2 or acetate. Requires anaerobic conditions (bottom of pond, landfill, sewage digester) (2) Halophiles : require extremes in salt (> 10%), contain pigment (bacteriorhodopsin) that can absorb light and create H+ gradient. (3) Thermoacidophiles : found in geothermal springs (high heat) and low pHs. b) Bacteria (Eubacteria) i) Contain peptidoglycan in c.w. ii) One type of RNA poly-ase. iii) Lack introns in genome. iv) Sensitive to antibiotics (streptomycin and chlroamphinicol) v) Ex. Purple bacteria, free-living, enteric, mycoplasmas, actinomycetes (soil bacteria), cyanobacteria, spirochetes, chlamydias. 2)
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This note was uploaded on 02/14/2012 for the course BIO 151 taught by Professor Grinblat during the Fall '08 term at Wisconsin.

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Chapter 27 - Prokaryotes Notes - AP BIOLOGY UNIT 9...

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