Microbiology 020 - General Microbiology » Fall 2020 » Lab Quiz 11

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Question #1
If the unknown microorganism cannot be cultured, the ______ approach can help us identify the unknown.
A.   genetic
B.   immunological
C.   all of these are correct
D.   phenotypic
Question #2
In addition to genetic and immunological approaches, identification of microbial unknowns can be done using phenotypic characteristics.
A.   TRUE
B.   FALSE
Question #3
Macroscopic characteristics that can be helpful in bacterial identification include…
A.   Gram stain reaction
B.   two of these are correct
C.   colony color
D.   colony form
Question #4
After preparing a pure culture of the unknown bacterium using an isolation method, the best starting point for the identification process is usually…
A.   determination of cell shape and Gram reaction
B.   determination of colony color and form
C.   determination of lactose fermentation
D.   determination of specialized structures, such as endospores
Question #5
Some types of media combine multiple tests to inform us of different types of information about an organism. How is this helpful?
A.   It allows us to determine the Gram reaction without having to do a stain
B.   It makes the biochemical testing process more efficient
C.   It gives us information about oxygen requirements so we can properly incubate the organism
D.   All of these are correct
Question #6
The small glass Durham tube that is inverted in the phenol red broth is used to…
A.   detect gas production
B.   two of these are correct
C.   detect hydrogen sulfide production
D.   detect acid production from fermentation
Question #7
The quickest method to isolate bacteria is/are…
A.   loop dilution pour plating method
B.   the streak plate method
C.   all of these are quick methods
D.   serial dilution spread plating
Question #8
The SIM medium is used to test for…
A.   indole production
B.   motility
C.   all of these are correct
D.   hydrogen sulfide production

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