Microbiology 020 - General Microbiology » Fall 2020 » Lab Quiz 2

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Question #1
Which of the following can influence microbial growth?
A.   Temperature
B.   All of these can influence microbial growth
C.   Atmospheric gases
D.   Osmotic pressure
Question #2
Bacteria are ubiquitous, found nearly everywhere.
A.   TRUE
B.   FALSE
Question #3
Bacteria are only found on inanimate objects.
A.   TRUE
B.   FALSE
Question #4
Most of the bacteria that we study prefer…
A.   Neutral pH
B.   All of these are correct
C.   Moderate temperatures (20-40˚C)
D.   Oxygen
Question #5
In the lab simulation, you compared growth of bacteria from several different environments and situations. Which of the following showed the least bacterial growth?
A.   without disinfecting the bench top
B.   after handwashing
C.   keyboard
D.   cash
Question #6
The best time period to observe incubated cultures is between ________ hours.
A.   24-28
B.   72
C.   2-4
D.   4-12
Question #7
When working in the laboratory, aseptic techniques are important because…
A.   it allows for more growth of the bacteria
B.   none of these are correct
C.   it helps to minimize contamination
D.   it allows you to keep accurate measurements
Question #8
Cultures that have only one type of organism are known as…
A.   Mixed cultures
B.   Pure cultures
C.   Broth cultures
D.   Slant cultures

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