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39 terms

Bacteria

STUDY
PLAY
archae and bacteria
the 2 domains of bacteria
archaebacteria and eubacteria
the 2 kingdoms of bacteria
archaebacteria
cell wall has no peptidoglycan
eubacteria
call wall has peptidoglycan
peptidoglycan
this maintains cell shape and counters high osmotic pressures
archaebacteria
these live in harsh environments (mud, animal intestines, salty environments, extreme temperatures)
eubacteria
these live in a variety of environments (human body, freshwater, saltwater, land)
methanogens
these live in environments that produce methane gas (oxygen free environment)
cynobacteria
this is blue green bacteria
nalophiles
this is a "salt loving" bacteria, lives in extremely salty places
thermoacidophiles
these live in environments with extreme temperatures that are highly acidic
bacillus
spore forming bacteria
rickettsia
obligate internal parasites
archaebacteria
methanogens, nalophiles, and thermoacidophiles are all examples of what kingdom of bacteria?
eubacteria
cynobacteria, bacillus, and rickettsia are all examples of what kingdom of bacteria?
bacilli
rod shaped bacteria
cocci
spherical shaped bacteria
spirilla
spiral and corkscrew shaped bacteria
gram positive and gram negative
the two types of cell walls found in bacteria
gram positive bacteria
have thick peptidoglycan walls and stain a violet/purple color through a method called gram-staining
gram negative bacteria
have a much thinner peptidoglycan cell wall covered with an outer lipid layer. these appear pink or light red through gram staining.
some do not move, some have flagella, some glide because they have a layer of slime like material they secrete
3 ways that bacteria can move
chemoheterotrophs
must take in organic molecules (oxygen) for energy and a supply of carbon
photoheterotrophs
use sunlight for energy but still need to take in an organic molecule for a carbon source
photoautotrophs
use light energy to convert CO2 and H2O to carbon compounds and oxygen (similar to photosynthesis in plants)
chemoautotrophs
use energy from chemicals (such as ammonia, hydrogen sulfide, sulfur, and iron) to make carbon compounds
obligate aerobes
organisms that require a constant supply of oxygen in order to live
obligate anaerobes
bacteria that must live in the absence of oxygen
faculatative anaerobes
bacteria that can survive with or without oxygen
binary fission
asexual form of reproduction that does not involve exchange or recombination of genetic material
conjugation
sexual form of reproduction in bacteria
spore formation
this occurs when growth conditions became unfavorable
decomposers
these help recycle nutrients in ecosystem by breaking down dead organisms
nitrogen fixers
these help "fix" or convert nitrogen gas into nitrogen compounds that can be used by plants
industry (cleaning small oil spills) natural/human body (E.coli makes vitamins in our intestines), biotechnology (restriction enzymes/recombinant DNA)
3 uses for bacteria
Pathogenic bacteria
disease causing bacteria
vaccine
preparation of weakened or killed pathogens, prompts the body to produce antibodies against the disease
antibodies
drugs used to attack and destroy bacteria
sterilization and disinfectants
2 ways to control bacteria growth