Bio 2010 - Microbiology » Summer 2022 » Lab Quiz 3

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Question #1
Organisms that can withstand high temperatures are said to be
A.   mesophilic
B.   resistant
C.   psychrophilic
D.   thermoduric
Question #2
The temperature it takes to kill an entire population of microbes after incubation for 10 minutes at a pH of 7 is called the
A.   decimal reduction time.
B.   point of saturation.
C.   thermal death time.
D.   thermal death point.
Question #3
Disinfectants are chemical compounds that reduce and inhibit the growth of microorganisms on
A.   skin and mucus membranes.
B.   inanimate objects.
C.   eyes.
D.   hair.
Question #4
Which of the following is considered non-ionizing radiation?
A.   UV
B.   x-ray
C.   gamma
Question #5
Light with wavelengths between 250-260 nM affects __________ in cells.
A.   DNA purines
B.   DNA pyrimidines
C.   protein structure
D.   RNA
Question #6
Exoenzymes
A.   are only produced by eukaryotic cells.
B.   are synthesized inside the cell and transported outside.
C.   are biosynthetic enzymes that join organic molecules together.
D.   are synthesized outside the cells and transported inside.
Question #7
We use this agar to determine if an organism produces the exoenzyme caseinase.
A.   skim milk
B.   nutrient gelatin
C.   spirit blue
D.   starch
Question #8
This indicator solution is used to show the presence of starch.
A.   sodium hydroxide
B.   iodine
C.   spirit blue
D.   phenol red
Question #9
Gelatinase and caseinase are both examples of
A.   lipases.
B.   DNases.
C.   amylases.
D.   proteases.

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