1|Page
Straighterline Microbiology Final BIO250
Microbiology Final Questions With Complete
Solutions
The study of evolutionary relationships among organisms
is called ______. - .....ANSWER... ✔✔ phylogeny
The three cell types discussed, eukaryotes, archaea, and
bacteria, all derived from ______. - .....ANSWER...
✔✔ Last Universal Common Ancestor
Organisms called parasites are ______. - .....ANSWER...
✔✔ always harmful to their host
Which of the following does not indicate microbe
involvement in energy and nutrient flow? - .....ANSWER...
✔✔ Thermal hot springs warmed by heat from
earth's interior
The subatomic particles that surround the nucleus are the
______. - .....ANSWER... ✔✔ Electrons
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The number one worldwide infectious diseases are
______. - .....ANSWER... ✔✔ respiratory disease
A fat is called _____ if all carbons of the fatty acid
chain are single-bonded to 2 other carbons and 2
hydrogens. - .....ANSWER... ✔✔ saturated
One technique for staining bacteria for viewing under
the microscope is called the Gram stain. In this technique,
alcohol is used as a decolorizer because it degrades the
outer membrane found in some bacteria. What chemical
component of the cell does alcohol affect? -
.....ANSWER... ✔✔ lipid
If a microbiologist is studying a specimen at a total
magnification of 950X, what is the magnifying power of
the objective lens if the ocular lens is 10X? -
.....ANSWER... ✔✔ 95X
NASA has published a list of criteria for identifying
fossil bacteria in samples from Mars, as part of a search
for evidence of life. Which of the following is good
evidence for the presence of bacterial cells? -
.....ANSWER... ✔✔ cell size of 0.5 to 2 microns
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Which type of microscope achieves the greatest
resolution and highest magnification? - .....ANSWER...
✔✔ electron
Which of the following is produced by adding 1% to
5% agar to nutrient broth that is then boiled and
cooled? - .....ANSWER... ✔✔ a solid medium
a spongiform encephalopathy of humans - .....ANSWER...
✔✔ Creutzfeldt-Jacob disease
The term that refers to flagella at both poles of the cell
is ______. - .....ANSWER... ✔✔ amphitrichous
In the condition called athlete's foot, the fungus
Trichophyton consumes the keratin protein found in hair,
nails, and dead skin. Which of the following descriptors
does not apply to Trichophyton? - .....ANSWER... ✔✔
saprobe
During the Gram stain, the application of alcohol results
in the decolorization of ______ cells. - .....ANSWER...
✔✔ gram-negative
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The size of a eukaryotic ribosome is ______ -
.....ANSWER... ✔✔ 80s
Sterilizing filters have a pore size of 0.22 μm. Which of
the following statements is true? - .....ANSWER... ✔✔
Bacterial cells are typically between 1-10 μm and are
blocked by the filter, whereas most viruses are between
20 and 200 nm and therefore pass through.
One of the principal viral capsid shapes is a 20-sided
figure with 12 evenly spaced corners referred to as
a/an _____ capsid. - .....ANSWER... ✔✔ icosahedral
Amoebic dysentery is most commonly contracted through
- .....ANSWER... ✔✔ fecal oral
the viral genome inserting into bacterial host
chromosome - .....ANSWER... ✔✔ lysogeny
Which of the following is not associated with every
virus? - .....ANSWER... ✔✔ envelope
Straighterline Microbiology Final BIO250
Microbiology Final Questions With Complete
Solutions
The study of evolutionary relationships among organisms
is called ______. - .....ANSWER... ✔✔ phylogeny
The three cell types discussed, eukaryotes, archaea, and
bacteria, all derived from ______. - .....ANSWER...
✔✔ Last Universal Common Ancestor
Organisms called parasites are ______. - .....ANSWER...
✔✔ always harmful to their host
Which of the following does not indicate microbe
involvement in energy and nutrient flow? - .....ANSWER...
✔✔ Thermal hot springs warmed by heat from
earth's interior
The subatomic particles that surround the nucleus are the
______. - .....ANSWER... ✔✔ Electrons
,2|Page
The number one worldwide infectious diseases are
______. - .....ANSWER... ✔✔ respiratory disease
A fat is called _____ if all carbons of the fatty acid
chain are single-bonded to 2 other carbons and 2
hydrogens. - .....ANSWER... ✔✔ saturated
One technique for staining bacteria for viewing under
the microscope is called the Gram stain. In this technique,
alcohol is used as a decolorizer because it degrades the
outer membrane found in some bacteria. What chemical
component of the cell does alcohol affect? -
.....ANSWER... ✔✔ lipid
If a microbiologist is studying a specimen at a total
magnification of 950X, what is the magnifying power of
the objective lens if the ocular lens is 10X? -
.....ANSWER... ✔✔ 95X
NASA has published a list of criteria for identifying
fossil bacteria in samples from Mars, as part of a search
for evidence of life. Which of the following is good
evidence for the presence of bacterial cells? -
.....ANSWER... ✔✔ cell size of 0.5 to 2 microns
,3|Page
Which type of microscope achieves the greatest
resolution and highest magnification? - .....ANSWER...
✔✔ electron
Which of the following is produced by adding 1% to
5% agar to nutrient broth that is then boiled and
cooled? - .....ANSWER... ✔✔ a solid medium
a spongiform encephalopathy of humans - .....ANSWER...
✔✔ Creutzfeldt-Jacob disease
The term that refers to flagella at both poles of the cell
is ______. - .....ANSWER... ✔✔ amphitrichous
In the condition called athlete's foot, the fungus
Trichophyton consumes the keratin protein found in hair,
nails, and dead skin. Which of the following descriptors
does not apply to Trichophyton? - .....ANSWER... ✔✔
saprobe
During the Gram stain, the application of alcohol results
in the decolorization of ______ cells. - .....ANSWER...
✔✔ gram-negative
, 4|Page
The size of a eukaryotic ribosome is ______ -
.....ANSWER... ✔✔ 80s
Sterilizing filters have a pore size of 0.22 μm. Which of
the following statements is true? - .....ANSWER... ✔✔
Bacterial cells are typically between 1-10 μm and are
blocked by the filter, whereas most viruses are between
20 and 200 nm and therefore pass through.
One of the principal viral capsid shapes is a 20-sided
figure with 12 evenly spaced corners referred to as
a/an _____ capsid. - .....ANSWER... ✔✔ icosahedral
Amoebic dysentery is most commonly contracted through
- .....ANSWER... ✔✔ fecal oral
the viral genome inserting into bacterial host
chromosome - .....ANSWER... ✔✔ lysogeny
Which of the following is not associated with every
virus? - .....ANSWER... ✔✔ envelope
