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