STRAIGHTERLINE MICROBIOLOGY FINAL EXAM
|LATEST UPDATED 2026/2027 |A COMPLETE
SOLUTION ALL ANSWERS GET IT 100% CORRECT
|VERIFIED BEST GRADED A+ FOR SUCCESS
The study of evolutionary relationships among organisms is called ______.
phylogeny
The three cell types discussed, eukaryotes, archaea, and bacteria, all
derived from ______.
Last Universal Common Ancestor
Organisms called parasites are ______.
always harmful to their host
Which of the following does not indicate microbe involvement in energy
and nutrient flow?
Thermal hot springs warmed by heat from earth's interior
The subatomic particles that surround the nucleus are the ______.
Electrons
The number one worldwide infectious diseases are ______.
respiratory disease
A fat is called _____ if all carbons of the fatty acid chain are single-
bonded to 2 other carbons and 2 hydrogens.
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?
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?
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?
cell size of 0.5 to 2 microns
Which type of microscope achieves the greatest resolution and highest
magnification?
electron
Which of the following is produced by adding 1% to 5% agar to nutrient
broth that is then boiled and cooled?
a solid medium
a spongiform encephalopathy of humans
Creutzfeldt-Jacob disease
The term that refers to flagella at both poles of the cell is ______.
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?
saprobe
During the Gram stain, the application of alcohol results in the
decolorization of ______ cells.
,gram-negative
The size of a eukaryotic ribosome is ______
80s
Sterilizing filters have a pore size of 0.22 μm. Which of the following
statements is true?
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.
icosahedral
Amoebic dysentery is most commonly contracted through
fecal oral
the viral genome inserting into bacterial host chromosome
lysogeny
Which of the following is not associated with every virus?
envelope
When bacilli in a chain fold back upon each other like a hinge, this
cellular arrangement is termed a ______.
palisade
proteins associated with DNA in the nucleus.
histones
Viral tissue specificities are called ______.
tropisms
the term that refers to the presence of a tuft of flagella emerging from a
single site is ______.
, lophotrichous
E. coli bacteria normally live in the human gut and produce vitamin K
that the body uses. This is best termed a ______ relationship.
mutualistic
Termites are insects that require the protozoan Trichonympha in their gut
to synthesize the enzyme cellulase to degrade the cellulose in wood. The
protozoan uses the end products of the cellulose breakdown (glucose).
This is a(n) ______ relationship.
mutualistic
The phase of the bacterial growth curve in which newly inoculated cells
are adjusting to their new environment, metabolizing but not growing at
an exponential rate, is the ______.
lag phase
The cell wall will help prevent the cell from bursting in ______
conditions.
hypotonic
This microbe is photosynthetic, but in the absence of light it can use
organic compounds as an energy source. Its carbon source is an organic
compound. The appropriate classification for this organism would be
______.
photoheterotroph
A microorganism that has an optimum growth temperature of 37°C, but
can survive short exposure to high temperatures is called a(n) ______.
thermoduric microbe
the end product binding to enzyme in noncompetitive site
Noncompetitive inhibition
Ribozymes are ______.
|LATEST UPDATED 2026/2027 |A COMPLETE
SOLUTION ALL ANSWERS GET IT 100% CORRECT
|VERIFIED BEST GRADED A+ FOR SUCCESS
The study of evolutionary relationships among organisms is called ______.
phylogeny
The three cell types discussed, eukaryotes, archaea, and bacteria, all
derived from ______.
Last Universal Common Ancestor
Organisms called parasites are ______.
always harmful to their host
Which of the following does not indicate microbe involvement in energy
and nutrient flow?
Thermal hot springs warmed by heat from earth's interior
The subatomic particles that surround the nucleus are the ______.
Electrons
The number one worldwide infectious diseases are ______.
respiratory disease
A fat is called _____ if all carbons of the fatty acid chain are single-
bonded to 2 other carbons and 2 hydrogens.
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?
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?
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?
cell size of 0.5 to 2 microns
Which type of microscope achieves the greatest resolution and highest
magnification?
electron
Which of the following is produced by adding 1% to 5% agar to nutrient
broth that is then boiled and cooled?
a solid medium
a spongiform encephalopathy of humans
Creutzfeldt-Jacob disease
The term that refers to flagella at both poles of the cell is ______.
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?
saprobe
During the Gram stain, the application of alcohol results in the
decolorization of ______ cells.
,gram-negative
The size of a eukaryotic ribosome is ______
80s
Sterilizing filters have a pore size of 0.22 μm. Which of the following
statements is true?
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.
icosahedral
Amoebic dysentery is most commonly contracted through
fecal oral
the viral genome inserting into bacterial host chromosome
lysogeny
Which of the following is not associated with every virus?
envelope
When bacilli in a chain fold back upon each other like a hinge, this
cellular arrangement is termed a ______.
palisade
proteins associated with DNA in the nucleus.
histones
Viral tissue specificities are called ______.
tropisms
the term that refers to the presence of a tuft of flagella emerging from a
single site is ______.
, lophotrichous
E. coli bacteria normally live in the human gut and produce vitamin K
that the body uses. This is best termed a ______ relationship.
mutualistic
Termites are insects that require the protozoan Trichonympha in their gut
to synthesize the enzyme cellulase to degrade the cellulose in wood. The
protozoan uses the end products of the cellulose breakdown (glucose).
This is a(n) ______ relationship.
mutualistic
The phase of the bacterial growth curve in which newly inoculated cells
are adjusting to their new environment, metabolizing but not growing at
an exponential rate, is the ______.
lag phase
The cell wall will help prevent the cell from bursting in ______
conditions.
hypotonic
This microbe is photosynthetic, but in the absence of light it can use
organic compounds as an energy source. Its carbon source is an organic
compound. The appropriate classification for this organism would be
______.
photoheterotroph
A microorganism that has an optimum growth temperature of 37°C, but
can survive short exposure to high temperatures is called a(n) ______.
thermoduric microbe
the end product binding to enzyme in noncompetitive site
Noncompetitive inhibition
Ribozymes are ______.
