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26 Cards in this Set

  • Front
  • Back
a strand of nucleic acid encased in a protein coat
a virus
these are extremely small, much smaller then bacteria
viruses
these can infect and attack cells of living organisms
viruses
the protein coat or sheath on the outside of it
capsid
virus that infects bacteria
bacteriophage
-attaches to a cell
-injects its RNA or DNA
-takes over control of the cell
-makes the cell make copies of itself
-cell bursts open releasing large numbers of new viruses
the infection process by a virus
a virus that transcribes DNA from an RNA template
retrivirus
this is retrivirus, it attacks our defen or immune systems
HIV
t or f

most viruses are highly specific to certain hosts
true
t or f

viruses have always been described as the link between the living and non living world
false, not always, only sometimes
-growth
-reproduction
-have rna or dna
-they genetically mutate or change

these are characteristics of what?
viruses
small, single celled organisms
bacteria
BASIC SHAPES
1) rod shape
2) spehrical shape
3) spiral shape
1) bacillus
2) coccus
3) spirillum
this has a cell wall containing lots of peptidoglycan
-retains purple dye when stained
gram positice bacteria
this has a cell wall with a think layer of peptigoglycan
-do not retain purple stain
gram negative bacteria
a gelatinous layer found outside of the cell wall and membrane
capsule
thick walled structure that forms around their chromosomes and cytoplasm
-protects them from harsh conditions, ofetn for years
endospores
get energey from photosynthesis
-they are autotrophs
photosynthetic bacteria
also called blue-green algae
cyanobacteria
anabaena
-the 'fix' nitrogen
ex
get their energy from chemical sources
-live in soil
-important role in nitrogen cycle
chemoautotrophic bacteria
most common bacteria
-main decomposer
-live off organic material made or formed by other organisms
heterotrophic bacteria
found in soil, many antibiotics are made from it
streptomyces
this involves bacteria int the respiratory system
-dangerous, can be fatal
tuberculosis
an antibiotic
-'wonder drug'
-discovered by dr. fleming in 1923
penicillin
these are ____________?
-tetrcycline
-streptomycin
-ampicillin
new antibiotics