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20 terms

Micro Lecture Exam 1

Quiz Questions
STUDY
PLAY
immunology
the study of the immune response to infection caused by microorganisms
all microorganisms are best defined as organisms that
are too small to be seen with the unaided eye
pathogens
disease causing microorganisms
If you inoculate staph and e-coli but only one grows in the culture what happened
it is a selective culture
pure culture
contains only one species of microorganism
agar is a complex polysaccharide that comes from
algae
For which bacterial genus is mannitol salt agar selective
staphylococcus
Newly inoculated cultures must be________ at a specific temperature and time to encourage growth
incubated
The Five I's are
Inoculate, Incubate, Isolate, Inspection, Identify
The purpose of staining cells on a microscope slide is to
Add contrast in order to see them
The type of microscope in which you would see brightly illuminated specimens against a black backgound is
dark-feild
What type of isolation technique is most effective for the majority of applications
streak plate
Which of the following magnifies the specimen to produce the real image of the specimen
objective lens
Which type of medium is able to distinguish different types of microorganisms based on an observable change in the colonies or in the medium
differential
three physical forms of laboratory media are
solid, semisolid, and liquid
a prokaryotic cell wall that has primarily peptidoglycan with small amounts of teichoic acid and lipoteichoic acid is
gram positive
bacteria in the genus Mycoplasma and bacteria called L-forms lack cell walls
true
Both gram positive and gram negative cells have outer membranes
false
chemotaxis refers to the ability to
move in response to a chemical
spirochetes have a twisting and flexing locomotion due to appendages called
periplasmic flagella (axial filaments)