Section 5 Flashcards
What is colony morphology?
one of the first characteristics used to distinguish an organism from other bacterial species
What are characteristics of lysobacteria and pseudomonas?
slimy, irregular shape, fluoresces under UV light
What are characteristics of streptomyces?
bold colours, white fuzzy surface, spores
What are characteristics of bacillus?
sprawl thinly of agar, dull colours
What are solid cultures?
culturable cells that proliferate where they’re deposited
How do cells move in a liquid media?
randomly
What are growth kinetics?
relationship between growth rate of a population and concentration of a substrate
What does it mean when cells are planktonic?
They are in a free-floating state
What are liquid cultures grown with?
shaker platforms
How can bacterial growth by approximated?
measuring how much light of a wavelength is absorbed by liquid culture over time
What is a spectrophotometer?
measures absorption as optical density units
What happens to the liquid culture when cell concentration increases?
gets cloudier
What is the standard growth curve?
model for keeping track of how a population of cells in liquid culture changes over time
What is the lag phase?
very little growth
cells take cues from environment and makes metabolic adjustments
What do cells do after the lag phase?
divide rapidly
