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.
Mesophile
C.
Alkalinophile
D.
Barophile
Question #2
Match the form of radiation with the corresponding wavelengths: UV-A
A.
280-315 nm
B.
10 nm or less
C.
315-400 nm
D.
100-280 nm
E.
1-100 nm
Question #3
Match the form of radiation with the corresponding wavelengths: UV-B
A.
1-100 nm
B.
10 nm or less
C.
315-400 nm
D.
100-280 nm
E.
280-315 nm
Question #4
Match the form of radiation with the corresponding wavelengths: UV-C
A.
1-100 nm
B.
10 nm or less
C.
280-315 nm
D.
100-280 nm
E.
315-400 nm
Question #5
Match the form of radiation with the corresponding wavelengths: Microwaves
A.
100-280 nm
B.
280-315 nm
C.
315-400 nm
D.
1-100 nm
E.
10 nm or less
Question #6
Match the form of radiation with the corresponding wavelengths: X rays
A.
315-400 nm
B.
100-280 nm
C.
280-315 nm
D.
10 nm or less
E.
1-100 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.
base
B.
acidic
C.
neutral
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.
amylase
B.
Catalase
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.
hydrogen
C.
oxygen
Question #10
Ultraviolet light kills cells by damaging:
A.
DNA
B.
red blood cells
C.
RNA
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.
catalase
B.
amylase
Question #12
A positive methyl red test indicates the production of:
A.
Mixed alkaline products
B.
Mixed acid fermentation products
C.
Oxygen
D.
Acetoin
E.
Indole
F.
Hydrogen sulfide
Question #13
Starch agar is the following type of media:
A.
Selective and differential
B.
Enrichment
C.
Differential only
D.
Selective only
E.
Chemically defined
F.
Reducing
Question #14
The pH indicator phenol red turns yellow at the following pH or below:
A.
6.8
B.
10.5
C.
6.2
D.
3.2
E.
9.2
F.
7.4
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.
Facultative anaerobe
B.
Obligate aerobe
C.
Starch hydrolysis
D.
Motility is present
E.
Nonsaccharolytic
F.
Obligate anaerobe
Question #16
A nitrate broth culture turns red after adding nitrate reagents A and B. What can you conclude from this result?
A.
Nitrate was reduced to nitrite
B.
Nitrate was reduced to ammonium
C.
Nitrate was converted to carbon dioxide
D.
Nitrite was reduced to nitrous oxide
E.
Oxygen was produced
F.
Denitrification occurred
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