Mid Term 1 Round-Up Flashcards
mike has been diagnosed with transferrin deficiency. because of this condition he is…
more susceptible to bacterial infections because he has more free iron
what is a pure culture?
a population of cells of the same species
can endospores multiply using binary fission?
no!
0.03 microns + outer membrane - organelles =
virus
transferrin is like a …. for iron and only our cells have the ….
vault, key
when is the best time of a growth curve to purify chemicals from cells?
log phase
when in the growth curve is the highest rate of endospore formation? why?
stationary phase. endospores are produced under stress.
when in the growth curve are antibiotics made?
stationary phase
when in the growth curve are the most endospores present?
death phase
why is the prolonged decline phase so prolonged?
cells are releasing nutrients when they die that other cells use
how do alpha particles appear on a blood agar?
subtle green clearing
what do beta particles look like in a blood agar?
lysis of RBCs produce large yellow clearnings
what would I least like to see in a blood agar of my own body?
beta particles
what is the temperature range that mesophiles love?
25-45
what are the three cool parts of an operon unit?
what do operons send again?
- ABS, promoter, operator
do eukaryotes send poly or mono cistronic messages?
monocistronic
do prokaryotes send poly or mono cistronic messages?
both! either!
what does ABS stand for in an operon unit?
Activator Binding Site
what does ABS do?
promote and enhance transcription
if transcription is going to be blocked via a repressor, where is that going to occur?
operator
what are the molecules called that cells release during quorum sensing?
autoinducer
what happens when it’s time for quorum sensing to abort mission?
- protease genes are turned on to chew up the biofilm and escape the host
- escaping the host ensures survival of the pathogen and finding a new host
quorum sensing:
LCD conditions means…
virulence genes ON/OFF
escape ON/OFF
toxin ON/OFF
biofilm ON/OFF
protease ON/OFF
virulence genes ON
toxin ON
pili ON
biofilm ON
quorum sensing:
HCD conditions means…
virulence genes ON/OFF
escape ON/OFF
toxin ON/OFF
biofilm ON/OFF
protease ON/OFF
virulence genes OFF
escape ON
toxin OFF
pili OFF
biofilm OFF
protease ON
