STRAIGHTERLINE MICROBIOLOGY 250
EXAM SCRIPT FINAL PAPER 2026 FULL
SOLUTION VIEW AHEAD
◉ Last Universal Common Ancestor.
Answer: The three cell types discussed, eukaryotes, archaea, and
bacteria, all derived from ______.
◉ always harmful to their host.
Answer: Organisms called parasites are ______.
◉ Thermal hot springs warmed by heat from earth's interior.
Answer: Which of the following does not indicate microbe
involvement in energy and nutrient flow?
◉ Electrons.
Answer: The subatomic particles that surround the nucleus are the
______.
◉ respiratory disease.
Answer: The number one worldwide infectious diseases are ______.
,◉ saturated.
Answer: A fat is called _____ if all carbons of the fatty acid chain are
single-bonded to 2 other carbons and 2 hydrogens.
◉ lipid.
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?
◉ 95X.
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.
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.
,Answer: Which type of microscope achieves the greatest resolution
and highest magnification?
◉ a solid medium.
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.
Answer: a spongiform encephalopathy of humans
◉ amphitrichous.
Answer: The term that refers to flagella at both poles of the cell is
______.
◉ saprobe.
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.
Answer: During the Gram stain, the application of alcohol results in
the decolorization of ______ cells.
, ◉ 80s.
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..
Answer: Sterilizing filters have a pore size of 0.22 μm. Which of the
following statements is true?
◉ icosahedral.
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.
Answer: Amoebic dysentery is most commonly contracted through
◉ lysogeny.
Answer: the viral genome inserting into bacterial host chromosome
◉ envelope.
Answer: Which of the following is not associated with every virus?
◉ palisade.
EXAM SCRIPT FINAL PAPER 2026 FULL
SOLUTION VIEW AHEAD
◉ Last Universal Common Ancestor.
Answer: The three cell types discussed, eukaryotes, archaea, and
bacteria, all derived from ______.
◉ always harmful to their host.
Answer: Organisms called parasites are ______.
◉ Thermal hot springs warmed by heat from earth's interior.
Answer: Which of the following does not indicate microbe
involvement in energy and nutrient flow?
◉ Electrons.
Answer: The subatomic particles that surround the nucleus are the
______.
◉ respiratory disease.
Answer: The number one worldwide infectious diseases are ______.
,◉ saturated.
Answer: A fat is called _____ if all carbons of the fatty acid chain are
single-bonded to 2 other carbons and 2 hydrogens.
◉ lipid.
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?
◉ 95X.
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.
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.
,Answer: Which type of microscope achieves the greatest resolution
and highest magnification?
◉ a solid medium.
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.
Answer: a spongiform encephalopathy of humans
◉ amphitrichous.
Answer: The term that refers to flagella at both poles of the cell is
______.
◉ saprobe.
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.
Answer: During the Gram stain, the application of alcohol results in
the decolorization of ______ cells.
, ◉ 80s.
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..
Answer: Sterilizing filters have a pore size of 0.22 μm. Which of the
following statements is true?
◉ icosahedral.
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.
Answer: Amoebic dysentery is most commonly contracted through
◉ lysogeny.
Answer: the viral genome inserting into bacterial host chromosome
◉ envelope.
Answer: Which of the following is not associated with every virus?
◉ palisade.
