MICROBIOLOGY STRAIGHTERLINE
FINAL EXAM 2026 FINAL PAPER
PRACTICE QUESTIONS ANSWERS
ACCURATE A+
◉ 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
◉ 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
◉ 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
◉ 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
◉ When bacilli in a chain fold back upon each other like a hinge, this
cellular arrangement is termed a ______.
Answer: palisade
◉ proteins associated with DNA in the nucleus.
Answer: histones
◉ Viral tissue specificities are called ______.
Answer: tropisms
FINAL EXAM 2026 FINAL PAPER
PRACTICE QUESTIONS ANSWERS
ACCURATE A+
◉ 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
◉ 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
◉ 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
◉ 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
◉ When bacilli in a chain fold back upon each other like a hinge, this
cellular arrangement is termed a ______.
Answer: palisade
◉ proteins associated with DNA in the nucleus.
Answer: histones
◉ Viral tissue specificities are called ______.
Answer: tropisms
