STRAIGHTERLINE MICROBIOLOGY
CERTIFICATION EVALUATION 2026
QUESTIONS AND SOLUTIONS VERIFIED
ANSWERS GRADED 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
CERTIFICATION EVALUATION 2026
QUESTIONS AND SOLUTIONS VERIFIED
ANSWERS GRADED 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
