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

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

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