BIOL 1202 Lecture 1: BIOL 1202 Ch. 27 Notes
Document Summary
Role of oxygen: obligate aerobes, obligate anaerobes, facultative anaerobes survive with or without o2 ff. Nitrogen: nitrogen essential for aa productions and nucleic acid, prokaryotes metabile nitrogen gg. Molecular systematics split pro into bacteria and archaea: polymerase chain reaction (pcr) more rapid sequencing of pro genomes jj. Table 27. 2: no known pathogenic archaea ll. Methanogens live in gut, reduce co2, strict anaerobes, poisoned by o2. Extreme thermophiles: swamps, marshes, methane is waste product oo. E coli beneficial and harmful, lives in intestines pp. Chlamydia trachomatis std blindness, urethritis; can live in animal cells ss. Gram positive: microplasma, actinomycetes decompose soil tt. Symbiosis relationships: mutualism both organisms benefit, commensalism o(cid:374)e (cid:271)e(cid:374)efits while other is(cid:374)"t har(cid:373)ed a(cid:374)d (cid:374)o (cid:271)e(cid:374)efit, parasitism one benefits, harming another, parasites causing disease are pathogens, intestines have lots of bacteria uu. Horizontal gene transfer can spread genes associated with virulence vv. Some pathogenic bacteria are potential weapons for bioterrorism ww.
