Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
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
|
