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16 Cards in this Set
- Front
- Back
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what are the 3 major phenotypic groups of archaea?
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methane producing
extreme halophilic extreme thermophilic eucararchaeota contains all 3 |
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what are 4 general characteristics of methane producing bacteria?
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1.strict aerobes
2.have some rep of all temp groups 3.most cocci and rod 4.obtain energy by methane biosynthesis |
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what are the 3 types of methanogenesis in archaea?
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type 1 - co2 reducing
type 2 - methyl reducing type 3 -aceticlastic |
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in type 1 co2 is reduced to what?
what are the e donors? what can some species use as an e donor? |
methane ch4
h2 and formate alcohol |
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in type 2 c1 comppounds are reduced to what?
where are e- obtained from? |
methane ch4
additional methyl group which is oxidized to co2 |
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in type 3 - acetate is converted to what?
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ch4 and c02
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methanogensis is what kind of respiration?
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anerobic respiration
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what are the substrates for methanogensis?
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fermentative products from bacteria and eucarya
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How many families and genus are halophilic?
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1 family and 14 genus
closely related |
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what concentration do halophiles grow best at?
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conc of nacl higher than 1.8 most grow at 4.0
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Some halophiles are also _ with ph optimum of _
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alkalinophiles
10 |
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many haloarcheae can undergo photosynthesis using what?
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bacteriorhodopsin
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how do archaea survive in high salt?
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conc of solutes is the same on outside and inside, enzymes usually require such high salt cond for activiation and may denature when too low
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the extreme thermophile archaea group includes _ and _
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thermophiles and hyperthermophiles
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many archaea extreme thermophiles have the optimum temp of _
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greater than 80 degrees
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what type of organism are extreme thermophiles? what energy sources do they use?
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chemoautotrophs
h2 h2s and S some use S as an e- donor others use it as e acceptor acidoiu uniformus can use it for both |
