BIOL 1020 Microbiology Lab Final
Exam With Approved Questions
and Answers | Latest Updated
zone of inhibition - Correct Answer-is the area around an antibiotic disc that contains
no bacterial growth.
Intermediate level of susceptibility - Correct Answer-requires higher
dosage of antibiotic to be successful
A nutrient agar plate allows growth of many different bacteria. It is an example of
which type of media? - Correct Answer-General purpose media
Selective media = prohibit growth of some organism
Differential media = enable many types of microbes to grow, contains indicator that
enables differences between microbes to be visualized
Enriched media = added growth factors for organism that don't grow well on typical
media
Streak plate isolation - Correct Answer-Streak plate is the primary mechanism for
isolating bacteria, uses 4 qudrant dilution using inoculation loop
Result of carbohydrate fermentation testing using maltose with phenol red as an
indicator are shown
below. Which of the tubes shows the result from a bacterial species that does not
produce hydrogen as a
by-product of its ability to ferment maltose? (A, B, C or E, D, None) - Correct Answer-
Yellow w/o gas production (orange)
The only information which might be obtained about a bacterial culture from observing
its growth on a
nutrient agar plate would be the - Correct Answer-Colony morphology
Staphylococcus epidermidis is different from Saccharomyces cerevisiae because -
Correct Answer-S. epidermidis is a
prokaryote
Escherichia.coli = rod shaped bacteria, gram neg, facultative anaerobic, coliform
bacerium. Genus Escheichia, found in warm blooded organism
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, Saccharomyces.cerevisiae = single celled fungi found on ripe fruits, flat, smooth, cream
color.
Staphlococcus.epidermidis = gram positive, non motile, grape like clusters, white
raised.
A positive catalase test will identify - Correct Answer-Aerobic organisms
The term "lophotrichous" refers to - Correct Answer-A tufted flagellar arrangement
All of the following pertain to the stained bacteria below except - Correct Answer-
Teichoic acid
The vaccine for the Yellow Fever virus is an attenuated vaccine, meaning that it is -
Correct Answer-A preparation containing live Yellow Fever viruses that are very
weakened and have
very low virulence
Each summer in Massachusetts illness caused by Vibrio parahaemolyticus trigger
mandatory a 14-day
federally mandated ban on the harvesting and/or processing of oysters from the
locations where the
oysters originated.... - Correct Answer-A cross contamination
Some of the common end-products of carbohydrate fermentation include all of the
following except:
Propionic acid - Ethyl alcohol - Acetic acid - pyruvic acid - Butyric acid - Correct
Answer-pyruvic acid
The Material Safety Data Sheet provides chemical substance information including all
of the following
except:Chemical reactivity - Protective equipment - Safe disposal - Chemical substitutes
- First Aid procedures - Correct Answer-Chemical substitutes
The calculated concentration in the original sample is: - Correct Answer-4.5x108 -
3.06x108 - 4.5x107 - 2x108
Bacteria cells undergoing asexual reproduction do so through the process of: - Correct
Answer-binary fission
of the 3 microbes in our experiments, the species which are normally members of the
human microflora include: - Correct Answer-S. epidermidis
and E.coli.
2|Page
Exam With Approved Questions
and Answers | Latest Updated
zone of inhibition - Correct Answer-is the area around an antibiotic disc that contains
no bacterial growth.
Intermediate level of susceptibility - Correct Answer-requires higher
dosage of antibiotic to be successful
A nutrient agar plate allows growth of many different bacteria. It is an example of
which type of media? - Correct Answer-General purpose media
Selective media = prohibit growth of some organism
Differential media = enable many types of microbes to grow, contains indicator that
enables differences between microbes to be visualized
Enriched media = added growth factors for organism that don't grow well on typical
media
Streak plate isolation - Correct Answer-Streak plate is the primary mechanism for
isolating bacteria, uses 4 qudrant dilution using inoculation loop
Result of carbohydrate fermentation testing using maltose with phenol red as an
indicator are shown
below. Which of the tubes shows the result from a bacterial species that does not
produce hydrogen as a
by-product of its ability to ferment maltose? (A, B, C or E, D, None) - Correct Answer-
Yellow w/o gas production (orange)
The only information which might be obtained about a bacterial culture from observing
its growth on a
nutrient agar plate would be the - Correct Answer-Colony morphology
Staphylococcus epidermidis is different from Saccharomyces cerevisiae because -
Correct Answer-S. epidermidis is a
prokaryote
Escherichia.coli = rod shaped bacteria, gram neg, facultative anaerobic, coliform
bacerium. Genus Escheichia, found in warm blooded organism
1|Page
, Saccharomyces.cerevisiae = single celled fungi found on ripe fruits, flat, smooth, cream
color.
Staphlococcus.epidermidis = gram positive, non motile, grape like clusters, white
raised.
A positive catalase test will identify - Correct Answer-Aerobic organisms
The term "lophotrichous" refers to - Correct Answer-A tufted flagellar arrangement
All of the following pertain to the stained bacteria below except - Correct Answer-
Teichoic acid
The vaccine for the Yellow Fever virus is an attenuated vaccine, meaning that it is -
Correct Answer-A preparation containing live Yellow Fever viruses that are very
weakened and have
very low virulence
Each summer in Massachusetts illness caused by Vibrio parahaemolyticus trigger
mandatory a 14-day
federally mandated ban on the harvesting and/or processing of oysters from the
locations where the
oysters originated.... - Correct Answer-A cross contamination
Some of the common end-products of carbohydrate fermentation include all of the
following except:
Propionic acid - Ethyl alcohol - Acetic acid - pyruvic acid - Butyric acid - Correct
Answer-pyruvic acid
The Material Safety Data Sheet provides chemical substance information including all
of the following
except:Chemical reactivity - Protective equipment - Safe disposal - Chemical substitutes
- First Aid procedures - Correct Answer-Chemical substitutes
The calculated concentration in the original sample is: - Correct Answer-4.5x108 -
3.06x108 - 4.5x107 - 2x108
Bacteria cells undergoing asexual reproduction do so through the process of: - Correct
Answer-binary fission
of the 3 microbes in our experiments, the species which are normally members of the
human microflora include: - Correct Answer-S. epidermidis
and E.coli.
2|Page
