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14 Cards in this Set
- Front
- Back
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How are Archaea SIMILAR to Eukarya?
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1. Genes encode proteins
2. Replication, transcription, translation |
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How are Archaea SIMILAR to Bacteria?
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1. Genes for metabolism
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How are Archaea UNIQUE?
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1. Unique rRNA gene structure
2. Capable of methanogenesis (formation of methane) |
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Name 3 significant characteristics of Archaea
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1. Highly diverse in morphology, physiology, repro. and ecology
2. Known for growing in pH extremems and high temps 3. Marine arctic and tropical waters |
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Know the cell characteristics
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This is review from last test
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What do Archaea flagella closely resemble?
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Bacterial pili
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Archaea do not have circular chromosomes and plasmids. T or F?
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False: they DO have circular chromosome and some MAY have plasmids
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What are the 5 major characteristic groups of Archaea's
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1. Methanogenic
2. Sulfate reducers 3. Extreme halophilic 4. Cell wall-less 5. Extreme thermophilic |
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What do we need to know on the test about these 5 groups?
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At least one sentence description and we DO NOT need do know specific species.
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Describe what is significant about Methanogens.
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1. Probably the most important group
2. Produce methane which can be used as clean burning feul and energy source 3. Methane is a greenhouse gas and MAY contribute to global warming |
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What is the significance of the Sulfate-reducing group?
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1. Extremely thermophilic and striclty anaerobic.
2. Hydrogen Sulfide (H2S) formed from sulfate |
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What is the significance of the Extreme Halophilic group?
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1. Most species require sodium chloride > than 1.5 M
2. Produce bright red colonies 3. Can use light energy to produce ATP |
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What is the significance of the Cell wall-less group?
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1. They are pleomorphic
2. Facultativley anaerobic 3. Membrane contains a mannose-rich glycoprotein 4. They are called Thermoplasmas |
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What is significant about the extreme thermophilic group?
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1. Optimal growth: 88 to 100 C (thermophillic) grow in boiling water
2. Striclty anaerobic 3. They are sulfer metabolizers: sulfer is reduced to hydrogen sulfide |
