Test 3 Flashcards
Most ancient genus of known bacteria
Aquifex
Most thermophilic of all bacteria
Aquifex
cells are surrounded by protein covering (toga)
Thermotoga
Not a thermophile, but had rRNA sequence that is similar to Aquifer, Thermotoga, and Chloroflexi
Deinococcus species
first isolated by foods sterilized by game radiation
can tolerate up to 5000 g-rays of radiation
stains gram positive due to thick peptidoglycan layer, but has an outer membrane like gram negative
Deinococcus species
large group of oxygenic phototrophs
Cyanobacteria
have thylakoids and carboxysome body and grow as filaments
Cyanobacteria
Fix N2
cyanobacteria, heliobacterium species, Azotobacter vinelandii, Rhizobium species, Prochlorococcus
have gas vesicles for buoyancy and cause nuisance blooms in freshwater
secrete many neurotoxins
cyanobacteria
survival stucture formed by Cyanobacteria
Akinetes
Smallest and most abundant photosynthetic microorganism on earth
Prochlorococcus species
3 divisions of Gram positive bacteria
Firmicutes, mollicutes, and actinobacteria
halotolerant, can be found on the skin and mucous membrane
Staphylococcus species
fermentative bacteria that produce lactic acid
Streptococcus/Lactobacillus species
can grow in very acid environments
Lactobacillus species
4 endospore formers
Clostridium, Bacillus, Sporosarcina, Heliobacterium
Strict anaerobes
Tetanus, botox, gangrene
Clostridium species
forms crystal in caterpillar’s gut (crystalline inclusion)
Bacillus thuringiensis
unique among endospore formers because cells are cocci instead of rods
common in soils
Sporosarcina species
anoxygenic phototrophs; strictly anaerobic
reside in soils and in highly alkaline environments
produce bacteriochlorophyll g
Heliobacterium species
key components of peptidoglycan are missing
Pleomorphic
pathogenic
Tenericutes/Mollicutes
example of mollicutes
Mycoplasma species
“low GC”
Firmicutes
“High GC”
Actinobacteria
produce mycelium analogous to mycelium of fungi
reproductive structures called conidia
primarily in soil microorganisms, responsible for earthy odor soils
Streptomyces species
produce over 500 distinct antibiotics including ahminoglycosides, tetracyclines, daptomycin, platensimycin
Streptomyces species
rod-shaped
acid fast due to mycolic acids
many are slow growers due to waxy/hydrophobic outer later
mycobacterium species
Largest and most metabolic group of bacteria
Proteobacteria
involved in a mutualistic relationship
alpha proteobacteria
fix nitrogen for the plants; plants provide photosynthesis products (can be oxidized to generate energy)
Rhizobium species
deficient in most metabolic functions, must get metabolites from host
Rickettsias species
very diverse in their degradation capacities
Beta proteobacteria
rods and curved rods
most inhibit aquatic environments
vibrio species (vibrio cholerae)
aerobic rod shaped bacteria with polar flagella
Major biofilm former
Pseudomonas species (pseudomonas aeruginosa)
colonize human intestinal tract
possess relatively simple nutritional requirements
Enteric Bacteria
example of mix-acid fermenters
Escherichia coli
example of butanediol fermenter
Enterobacter aerogenes
universal inhabitants of intestinal tract of humans and warm-blooded animals
synthesize vitamins for host
Escherichia coli
food poisoning (pathogenicity island)
Salmonella species
Shingellosis (dysentery)
Shingella species
free-living, aerobic
large, obligately aerobic rods
can form resting structures (cysts)
produce extensive capsules or slime layers
Azotobacter vinelandii
Gliding bacteria, twitching motility
lifestyle includes consumption of dead organic matter or other bacterial cells
Myxococcus species
Parasitic to other bacteria
grows in periplasm of host, feeding on the biopolymers
Bdellovibrio species
Common host and end result of Bdellovibrio species
E. coli
lysis of host cells
smallest group of proteobacteria
abundant in toxic and anoxic interfaces in sulfur-rich environments
Epsilon proteobacteria
cause stomach ulcers
burrows below protective mucous layer
Heliobacter pylori
30% of weight of human fecal material is made of this
Bacteroides species
synthesize sphingolipids
Bacteroides species