MICROBIOLOGY STRAIGHTERLINE TEST FINAL
EXAM 2024 ACTUAL EXAM 2 VERSIONS (VERSION A
AND B) COMPLETE ACCURATE EXAM QUESTIONS
WITH DETAILED VERIFIED ANSWERS (100%
CORRECT ANSWERS) //ALREADY GRADED A+
The study of evolutionary relationships among organisms is called ______. - ANSWER
phylogeny
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
the term that refers to the presence of a tuft of flagella emerging from a single site is
______. - ANSWER lophotrichous
E. coli bacteria normally live in the human gut and produce vitamin K that the body
uses. This is best termed a ______ relationship. - ANSWER 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. -
ANSWER 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
______. - ANSWER lag phase
The cell wall will help prevent the cell from bursting in ______ conditions. - ANSWER
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 ______. - ANSWER photoheterotroph
A microorganism that has an optimum growth temperature of 37°C, but can survive
short exposure to high temperatures is called a(n) ______. - ANSWER thermoduric
microbe
the end product binding to enzyme in noncompetitive site - ANSWER Noncompetitive
inhibition
Ribozymes are ______. - ANSWER catalysts for RNA splicing
Most electron carriers are ______. - ANSWER coenzymes
what is the usual net production of ATP? - ANSWER 2
Exergonic reactions occur during - ANSWER aerobic cellular respiration
Each nucleotide is composed of - ANSWER one phosphate, one nitrogenous base, and
one sugar
A frameshift is caused by ______ mutations. - ANSWER deletion and insertion
The fields of genomics and proteomics differ in that - ANSWER genomics refers to the
study of an organism's entire genome, whereas proteomics is the study of expressed
proteins
endosymbiotic theory - ANSWER eukaryotes
Replication of DNA begins at a/an _______ rich area. - ANSWER adenine-thymine
A/an _____ is the protein shell around the nucleic acid core of a virus. - ANSWER
capsid
The long, thread-like branching cells of molds are called ______. - ANSWER hyphae
EXAM 2024 ACTUAL EXAM 2 VERSIONS (VERSION A
AND B) COMPLETE ACCURATE EXAM QUESTIONS
WITH DETAILED VERIFIED ANSWERS (100%
CORRECT ANSWERS) //ALREADY GRADED A+
The study of evolutionary relationships among organisms is called ______. - ANSWER
phylogeny
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
the term that refers to the presence of a tuft of flagella emerging from a single site is
______. - ANSWER lophotrichous
E. coli bacteria normally live in the human gut and produce vitamin K that the body
uses. This is best termed a ______ relationship. - ANSWER 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. -
ANSWER 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
______. - ANSWER lag phase
The cell wall will help prevent the cell from bursting in ______ conditions. - ANSWER
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 ______. - ANSWER photoheterotroph
A microorganism that has an optimum growth temperature of 37°C, but can survive
short exposure to high temperatures is called a(n) ______. - ANSWER thermoduric
microbe
the end product binding to enzyme in noncompetitive site - ANSWER Noncompetitive
inhibition
Ribozymes are ______. - ANSWER catalysts for RNA splicing
Most electron carriers are ______. - ANSWER coenzymes
what is the usual net production of ATP? - ANSWER 2
Exergonic reactions occur during - ANSWER aerobic cellular respiration
Each nucleotide is composed of - ANSWER one phosphate, one nitrogenous base, and
one sugar
A frameshift is caused by ______ mutations. - ANSWER deletion and insertion
The fields of genomics and proteomics differ in that - ANSWER genomics refers to the
study of an organism's entire genome, whereas proteomics is the study of expressed
proteins
endosymbiotic theory - ANSWER eukaryotes
Replication of DNA begins at a/an _______ rich area. - ANSWER adenine-thymine
A/an _____ is the protein shell around the nucleic acid core of a virus. - ANSWER
capsid
The long, thread-like branching cells of molds are called ______. - ANSWER hyphae
