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Microbiology > Domain: Bacteria > Flashcards

Domain: Bacteria Flashcards

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Biology 101 flashcards
1
Q

Bacteria Phyla

A 
Proteobacteria
Cyanobacteria
Actinobacteria
Gram-positive bacteria
Chlamydiae
Planctomycetes
Bacerioidetes
Chlorobi- Green sulfur bacteria
Chloroflexus
Spirochaetes
Deinococcus/ Thermus
Thermotagae
Aquificales
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2
Q

Bacteria: Proteobacteria: name 5 subgroups

A

Alpha,Beta,Gamma, Delta, Epsilon

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3
Q

Bacteria: Proteobacteria

general characteristics

A

most derived group
largest group
many different metabolisms within
gram negative -

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4
Q

Bacteria: Proteobacteria:

Alphaproteobacteria

A 
lineage that mitochondria came from
purple NON sulfur bacteria
can photosynthesize
Rickettsia - intracellular parasites, lack a glycolytic pathway (rocky mountain spotted fever)
Rhizobium (fix N2 in legumes)
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5
Q

Bacteria: Proteobacteria:

Gammaproteobacteria

A 
largest class of proteobacteria
purple SULFUR bacteria- anaerobic photolithoautotrophs. use H2S as electron donor an ( S oxidizer) d deposits S 
intracellularly
Psuedomonads- most poorly defined taxonomic group
Vibrios- bioluminescents, cholera
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6
Q

Bacteria: Proteobacteria

Delta proteobacteria

A

Sulfate reducers
B dellovibrio- parasitic bacteria infect other bacteria alien style
Myxobacteria- free living single cells that aggregate then differentiate into fruiting bodies where not all survive ( altruistic ?)

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7
Q

What is Quorum sensing?

A

how some single celled organisms can sense and communicate with each other, based on local population density
ex. myxobacteria- single cell organism that will aggregate and form a large multicellular fruiting body

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8
Q

Bacteria: Proteobacteria

Epsilon proteobacteria

A 
smallest class of proteos
mostly uncultured
some thermophiles
Campylobacter- pathogen that cause spontaneous abortions
H. pylori- cause of ulcers
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9
Q

What are the two gram positive bacteria phyla?

A

Firmicutes- low GC

Actinbacteria- high GC

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10
Q

Cyanobacteria

A

Largest, most diverse group of photosynthetic bacteria
Many fix N
Mixotrophic
Oxygenic photosynthesis

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11
Q

Chlamydiae

A

Obligate intracellular parasites

Chlamydia- best studied, parasites of mammals and birds

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12
Q

Planctomycetes

A

Bacteria
Cell walls lack peptidoglycan
Nuclear body is membrane bound!
Cytoplasm is compartmentalized

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13
Q

Bacteroidetes

A

Bacteria
Fermentative anaerobic chemo heterotrophs
Found in oral cavity and intestinal tract of humans( most abundant bacteria in human colon) and the rumen of ruminants
Often benefit host by breaking down complex carbs giving host extra nutrition
Some can cause disease

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Microbiology (9 decks)

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