4.5 Archea Flashcards
Are archea unicellular or multicellular?
Unicellular
Archea similarities to eukaryotes
Similar ribosomes (70s, but more like 80s), and synthesis processes
Archea’s unique qualities
has a unique rRNA sequence, and the DNA compaction is single and circular
Does archea have a cell wall?
No
Archea’s cell membrane contains…
Long branched hydrocarbons with ether links
Can archea move?
Yes, with fimbrae like structures
Why are archea considered extremeophiles
Because they can live in harsh conditions and have adapted to resist extremes in the envrionment
What are the main types of extremophiles? (4)
methane producers, hyperthermophiles, extreme halophiles, and sulfur reducers
Describe methanogens (2)
it converts co2 to o2 and methane gas, which contributes to the greenhouse effect; dense areas such as swamps
Describe halophiles (3)
they require salt to grow; live in salty places (but not the ocean); and use a red dye to synthesize ATP
Describe psychrophiles
live in coldness
Describe thermophiles
live in heat (80-113 c)
How are archea identified?
rRNA sequencing (also helped identify metabolic processes)
Archea and the human biome
They are present in the human biome in the mouth, colon, and vagina
Archea and its effect on humans
There is a link between the presence of archea in gingiva and periodontal disease
