Straighterline Microbiology Final Exam__
Questions With 100% Correct Answers_2024
1. phylogeny (Correct Answer) - ✅✅ The study of evolutionary relationships among
organisms is called ______.
2. Last Universal Common Ancestor (Correct Answer) - ✅✅ The three cell types
discussed, eukaryotes, archaea, and bacteria, all derived from ______.
3. always harmful to their host (Correct Answer) - ✅✅ Organisms called parasites are
______.
4. Thermal hot springs warmed by heat from earth's interior (Correct Answer) - ✅✅
Which of the following does not indicate microbe involvement in energy and nutrient
flow?
5. Electrons (Correct Answer) - ✅✅ The subatomic particles that surround the nucleus
are the ______.
6. respiratory disease (Correct Answer) - ✅✅ The number one worldwide infectious
diseases are ______.
7. saturated (Correct Answer) - ✅✅ A fat is called _____ if all carbons of the fatty acid
chain are single-bonded to 2 other carbons and 2 hydrogens.
,8. lipid (Correct Answer) - ✅✅ 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?
9. 95X (Correct Answer) - ✅✅ 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?
cell size of 0.5 to 2 microns (Correct Answer) - ✅✅ 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?
electron (Correct Answer) - ✅✅ Which type of microscope achieves the greatest
resolution and highest magnification?
a solid medium (Correct Answer) - ✅✅ Which of the following is produced by adding
1% to 5% agar to nutrient broth that is then boiled and cooled?
Creutzfeldt-Jacob disease (Correct Answer) - ✅✅ a spongiform encephalopathy of
humans
amphitrichous (Correct Answer) - ✅✅ The term that refers to flagella at both poles of
the cell is ______.
saprobe (Correct Answer) - ✅✅ 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?
,gram-negative (Correct Answer) - ✅✅ During the Gram stain, the application of
alcohol results in the decolorization of ______ cells.
80s (Correct Answer) - ✅✅ The size of a eukaryotic ribosome is ______
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. (Correct Answer) - ✅✅
Sterilizing filters have a pore size of 0.22 μm. Which of the following statements is true?
icosahedral (Correct Answer) - ✅✅ One of the principal viral capsid shapes is a 20-
sided figure with 12 evenly spaced corners referred to as a/an _____ capsid.
fecal oral (Correct Answer) - ✅✅ Amoebic dysentery is most commonly contracted
through
lysogeny (Correct Answer) - ✅✅ the viral genome inserting into bacterial host
chromosome
envelope (Correct Answer) - ✅✅ Which of the following is not associated with every
virus?
palisade (Correct Answer) - ✅✅ When bacilli in a chain fold back upon each other like
a hinge, this cellular arrangement is termed a ______.
histones (Correct Answer) - ✅✅ proteins associated with DNA in the nucleus.
, tropisms (Correct Answer) - ✅✅ Viral tissue specificities are called ______.
lophotrichous (Correct Answer) - ✅✅ the term that refers to the presence of a tuft of
flagella emerging from a single site is ______.
mutualistic (Correct Answer) - ✅✅ E. coli bacteria normally live in the human gut and
produce vitamin K that the body uses. This is best termed a ______ relationship.
mutualistic (Correct Answer) - ✅✅ 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.
lag phase (Correct Answer) - ✅✅ 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 ______.
hypotonic (Correct Answer) - ✅✅ The cell wall will help prevent the cell from bursting
in ______ conditions.
photoheterotroph (Correct Answer) - ✅✅ 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 ______.
thermoduric microbe (Correct Answer) - ✅✅ A microorganism that has an optimum
growth temperature of 37°C, but can survive short exposure to high temperatures is called
a(n) ______.
Questions With 100% Correct Answers_2024
1. phylogeny (Correct Answer) - ✅✅ The study of evolutionary relationships among
organisms is called ______.
2. Last Universal Common Ancestor (Correct Answer) - ✅✅ The three cell types
discussed, eukaryotes, archaea, and bacteria, all derived from ______.
3. always harmful to their host (Correct Answer) - ✅✅ Organisms called parasites are
______.
4. Thermal hot springs warmed by heat from earth's interior (Correct Answer) - ✅✅
Which of the following does not indicate microbe involvement in energy and nutrient
flow?
5. Electrons (Correct Answer) - ✅✅ The subatomic particles that surround the nucleus
are the ______.
6. respiratory disease (Correct Answer) - ✅✅ The number one worldwide infectious
diseases are ______.
7. saturated (Correct Answer) - ✅✅ A fat is called _____ if all carbons of the fatty acid
chain are single-bonded to 2 other carbons and 2 hydrogens.
,8. lipid (Correct Answer) - ✅✅ 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?
9. 95X (Correct Answer) - ✅✅ 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?
cell size of 0.5 to 2 microns (Correct Answer) - ✅✅ 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?
electron (Correct Answer) - ✅✅ Which type of microscope achieves the greatest
resolution and highest magnification?
a solid medium (Correct Answer) - ✅✅ Which of the following is produced by adding
1% to 5% agar to nutrient broth that is then boiled and cooled?
Creutzfeldt-Jacob disease (Correct Answer) - ✅✅ a spongiform encephalopathy of
humans
amphitrichous (Correct Answer) - ✅✅ The term that refers to flagella at both poles of
the cell is ______.
saprobe (Correct Answer) - ✅✅ 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?
,gram-negative (Correct Answer) - ✅✅ During the Gram stain, the application of
alcohol results in the decolorization of ______ cells.
80s (Correct Answer) - ✅✅ The size of a eukaryotic ribosome is ______
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. (Correct Answer) - ✅✅
Sterilizing filters have a pore size of 0.22 μm. Which of the following statements is true?
icosahedral (Correct Answer) - ✅✅ One of the principal viral capsid shapes is a 20-
sided figure with 12 evenly spaced corners referred to as a/an _____ capsid.
fecal oral (Correct Answer) - ✅✅ Amoebic dysentery is most commonly contracted
through
lysogeny (Correct Answer) - ✅✅ the viral genome inserting into bacterial host
chromosome
envelope (Correct Answer) - ✅✅ Which of the following is not associated with every
virus?
palisade (Correct Answer) - ✅✅ When bacilli in a chain fold back upon each other like
a hinge, this cellular arrangement is termed a ______.
histones (Correct Answer) - ✅✅ proteins associated with DNA in the nucleus.
, tropisms (Correct Answer) - ✅✅ Viral tissue specificities are called ______.
lophotrichous (Correct Answer) - ✅✅ the term that refers to the presence of a tuft of
flagella emerging from a single site is ______.
mutualistic (Correct Answer) - ✅✅ E. coli bacteria normally live in the human gut and
produce vitamin K that the body uses. This is best termed a ______ relationship.
mutualistic (Correct Answer) - ✅✅ 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.
lag phase (Correct Answer) - ✅✅ 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 ______.
hypotonic (Correct Answer) - ✅✅ The cell wall will help prevent the cell from bursting
in ______ conditions.
photoheterotroph (Correct Answer) - ✅✅ 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 ______.
thermoduric microbe (Correct Answer) - ✅✅ A microorganism that has an optimum
growth temperature of 37°C, but can survive short exposure to high temperatures is called
a(n) ______.
