Microbiology 020 - General Microbiology » Spring 2022 » Lab Quiz 2
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Question #1
Organisms that are adapted grow at temperatures between 15 and 45 Celsius are know as:
A.
Halophile
B.
Barophile
C.
Mesophile
D.
Alkalinophile
Question #2
Match the form of radiation with the corresponding wavelengths: UV-A
A.
100-280 nm
B.
315-400 nm
C.
10 nm or less
D.
280-315 nm
E.
1-100 nm
Question #3
Match the form of radiation with the corresponding wavelengths: UV-B
A.
280-315 nm
B.
1-100 nm
C.
315-400 nm
D.
100-280 nm
E.
10 nm or less
Question #4
Match the form of radiation with the corresponding wavelengths: UV-C
A.
10 nm or less
B.
100-280 nm
C.
315-400 nm
D.
280-315 nm
E.
1-100 nm
Question #5
Match the form of radiation with the corresponding wavelengths: Microwaves
A.
315-400 nm
B.
1-100 nm
C.
10 nm or less
D.
280-315 nm
E.
100-280 nm
Question #6
Match the form of radiation with the corresponding wavelengths: X rays
A.
315-400 nm
B.
100-280 nm
C.
10 nm or less
D.
1-100 nm
E.
280-315 nm
Question #7
You inoculate and incubate a Phenol Red Glucose tube. The tube turns yellow. This color change indicates that the pH in the tube has become more
A.
neutral
B.
base
C.
acidic
Question #8
You add hydrogen peroxide to your bacterial unknown and you observe bubbles form within a few seconds. What enzyme is responsible for these bubbles?
A.
Catalase
B.
amylase
Question #9
You add hydrogen peroxide to your bacterial unknown and you observe bubbles form within a few seconds. What is the name of the gas product produced?
A.
helium
B.
oxygen
C.
hydrogen
Question #10
Ultraviolet light kills cells by damaging:
A.
RNA
B.
red blood cells
C.
DNA
Question #11
You add iodine to a starch plate that has a bacterial streak on it. While the plate turns brown, you observe a clear zone around the bacterial streak. This reaction indicates the organism produces the following enzyme:
A.
amylase
B.
catalase
Question #12
A positive methyl red test indicates the production of:
A.
Mixed acid fermentation products
B.
Mixed alkaline products
C.
Indole
D.
Oxygen
E.
Acetoin
F.
Hydrogen sulfide
Question #13
Starch agar is the following type of media:
A.
Reducing
B.
Selective and differential
C.
Enrichment
D.
Selective only
E.
Chemically defined
F.
Differential only
Question #14
The pH indicator phenol red turns yellow at the following pH or below:
A.
7.4
B.
6.2
C.
3.2
D.
10.5
E.
9.2
F.
6.8
Question #15
You inoculate a set of two OF-glucose tubes with your unknown. Both tubes (with and without oil) have growth and turned yellow. What can you conclude about your unknown?
A.
Starch hydrolysis
B.
Facultative anaerobe
C.
Motility is present
D.
Obligate anaerobe
E.
Nonsaccharolytic
F.
Obligate aerobe
Question #16
A nitrate broth culture turns red after adding nitrate reagents A and B. What can you conclude from this result?
A.
Oxygen was produced
B.
Denitrification occurred
C.
Nitrite was reduced to nitrous oxide
D.
Nitrate was converted to carbon dioxide
E.
Nitrate was reduced to ammonium
F.
Nitrate was reduced to nitrite
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