Nutrition and Growth Flashcards
what is an obligate aerobe
need 02
cannot ferment
die w/out 02
what is an obligate anaerobe
die in presence of 02
do not have enzymes
what is a facultative anaerobe
prefer 02
get lots of ATP from 02
can survive by fermenting
what is osmotic pressure
hypertonic/hypotonic
isotonic
shrinking
lysis
what is used in lab yo culture microorganisms
complex media
what is chemically defined media
vitamine and antibiotic assays
what is selective cultures
selects for a type of organism
what is differential cultures
put something else in media that chnages color
what is binary fission
arithemtic
logarithmic
what is generation time
time for division
1-3 hr
what is the lag pahse
no growth
what is the log phase
exponential growth
what is the stationary phase
still dividing but also dying
what is total direct count
put on slide, stain and count
dead bacteria stain red
what is viable count
doing in environment
put on plate and count with eyes
