Micro lecture 20 Flashcards
Microbial hyperthermophiles grow above 80 degress C True or false
true
what are aquificota and thermotogota ?
these are phylums that hypertheromophiles
produce water as by product
aquifex
Chemlithotrophs that acapture energy by oxidizing hydrogen, thiosulfatre and sulfur with oxygen as a terminal electron acceptor
aquifex
what genus are able to grow in marine hydrothermal systems and terrrestrial mineral springs and have outer sheathlike envelope ?
Thermotoga
Chemoorganotrophs ?
organism that obtains energy from the oxidation of reduced organic compounds
what are the two families that belong to the phylum Deinococcota?
Dienococcaceae and thermaceace
Profile for Deinococcus
Spherical/rod shape
nonmotile
tertrads
Extremophiles
Which nonproteo gram negative bacteria is notable for resistance to radio activity ?
Deinococcaceace
what nonproteobacteria can eat nuclear waste and survive in a vacuum of space ?
Dienococcaceace
Contaims T.aquatics
Thermales
Which gram negative nonproteobacteria can carry out oxygenic photosynthesis ?
Cyanobacteria
Cyanobacteria have the ability to use water as an electron donor, but are unable to fix carbon to generate oxygen?
False they can do both
Chloroplast are cyanobacteria? t or f
true
Cyanobacteria are unable to enagage in symbiotic relationships with fungi and cannot fix nitrogen? t or false
false
they fix nitrogen
and can have symbiotic relationships
Cyanobacteria use chlorophyll,carotenoids, phycobilin and contain thylakoids
true
What type of nonproteobacteria contain carboxysomes?
cyanobacteria
what are carboxysomes?
they are particularly found in cyanobacteria and are comparts that store carbonic anhydrase and Rubisco
What nonproteobacteria employ CO2-concentration mechansims to facilitate high rates of carbon fixation?
cyanobacteria
Heterocysts profile
specialized cells for Nitrogen fixation
produced when organism is nitrogen is deprived
what is unique about heterocysts cell wall?
it prevents the O2 to diffuse into the cell that woul inactivate nitrogenase
how are we able to distinguish between the different prochlorophytes ?
we can do this by testign them for the presence of chlorophyll a and b and lack of phycobilins?
which cyanobacteria are the only ones to possess chlorophyll b?
prochlorophytes
found in phylum chlorobiota and are obligate anaerobs, and photolithoautotrophs?
Green sulfur bacteria
which nonproteobacteria that are gram negative use H2S, elemental sulfur and H2 as electron sources ?
green sulfur bacteria
What have the ability to perform anoxygenic photosynthesis?
green sulfur bacteria
describe the bacterial structure of green sulfur bacteria
chlorosomes
FMO
Green sulfur bacteria are able to produce o2 as a by product? t or f
false
ellipsoidal vesicles attached to plasma membrane that contain photosynthetic pigments with lipid monolayer are called
chlorosomes
Once energy is captured in the chlorosomes where is the energy leaded?
it goes to the FMO where it then transfers energy to reaction center
phylum Chloroflexota are home to that what bacteria?
Green non sulfur bacteria
What phylum can perform anaerobic ammonium oxidation?
Phylum planctomycetes
The PVC superphylum stand for ?
Verrucomicrobiota
Chlamydiota
Planctomycetota
What are anammoxosomes?
They belong to planctomycetes and are membrane bound organelle that occupies the cell volume
Anammox reaction
localized anaerobic ammonia oxidation
Obligate intracellular parasites
Phylum Chlamydiae
what is unique about the cell wall of planctomycetes ?
cell wall lacks peptidoglycan
How are planctomycetes able to attach to surfaces
throuh stalk and hold fast
What is the unique reproduction associated with chlamydiae?
EB( elementary bodies) attach to host cell and produced RB
RB (reticulate body) reproduce via Binary fission and lysed to release EB
Chlamydial are able to catabolize carbohydrates, synthesize ATP or NAD+. T o F
False : they cannot do this an must rely on the host ATP
What chemoorganotroph bacteria have slender long but flexible helical shape?
Spirochaetota
What is the periplasmic Flagella?
Extend from both end of the cylinder and wrap around PDG in spirochaetota
- Gives the abilit for motiliy with corkscrew like movement
Symbiotic association between spirochetes and other organisms can cause diseases like ?
lyme disease and Phase variation
What nonproteobacteria produces anaerobic non-spore-forming rods
bacteroides
Can be found in human intestinal tract and animal rumens?
Bacteroides
How are bacteroides abe to benefit thier host?
degrade cellulose,pectins and complex carbohydrates
Has the characteristics spindle or football shape that can be obligate/facultative anaerobes and opportunisitc infections….
Fusobacteriota
what is an opportunistic pathogens?
Some can be pathogen when presented with right circumstances
SRB stands for ?
sulfur reducing bacteria
SRBs have what ability ?
reduce sulfur and other oxidizing compunds to H2S2
Dissimilatroy sulfate reduction?
sulfur atoms not incorporated into the biomass
Genus Bdellovibrio is aerobic, gram negativeand curved rods with polar flagella
true
Bdellovibrio is unique in that is preys on other gram negative bacteria
true
contain complex life cycels that include fruiting bodies and formation of myxospores
Myxobacteria
