Microbial Structure
Question 1
0.25 / 0.25 pts
Bacterial endospores function in
Correct!
survival
protein synthesis
reproduction
storage
Question 2
0.25 / 0.25 pts
The most immediate result of destruction of a cell's ribosomes would be
destruction of the cell's DNA.
Correct!
protein synthesis would stop
material would not be able to cross the cell membrane.
formation of glycogen inclusions
Question 3
0.25 / 0.25 pts
All of the following are true about bacterial endospores EXCEPT
their longevity ranges to immortality
Correct!
they are a means of reproduction
they are resistant to heat
they are seen in Bacillus and Clostridium sp.
Question 4
0.25 / 0.25 pts
The LPS layer in gram-negative cell wall releases (?) that cause (?)
teichoic acid, inflammation
phosphates, lysis
Correct!
endotoxin, fever
enzymes, pain
Question 5
0.25 / 0.25 pts
The major difference between a spirochete and a spirillum is
Correct!
the nature of motility
the presence of twists
size
presence of flagella
Question 6
0.25 / 0.25 pts
Which of the following is a primary bacterial cell wall function?
Correct!
support
adhesion
transport
motility
Question 7
0 / 0.25 pts
Type IV Pili are appendages in (?) bacteria that serve as a means of (?)
gram-negative, protection
You Answered
gram-positive, attachment
Correct Answer
Gram negative, genetic exchange
gram-positive, genetic exchange
Question 8
0.25 / 0.25 pts
The eukaryotic cell organelle that most resembles a bacterial cell is the
golgi apparatus
Correct!
mitochondria
lysosome
nucleus
Question 9
0.25 / 0.25 pts
The site of protein synthesis in a eukaryotic cell is in the _________ and in prokaryotic cells is in the _______.
mitochondria, cell membrane
golgi apparatus, cell wall
Correct!
rough endoplasmic reticulum, cytoplasm
cell membrane, cytoplasm
Question 10
0.25 / 0.25 pts
Which of the following is NOT a difference between endospores and vegetative cells?
Vegetative cells are metabolically active, whereas endospores are dormant.
Correct!
Vegetative cells are more resilient due to their metabolic activities, whereas endospores are more sensitive to change
Vegetative cells stain easily using normal staining protocols, whereas endospores are difficult to stain without special endospore stains
Vegetative cells normally have enzyme activity, whereas endospores do not show enzymatic activity
Question 11
0.25 / 0.25 pts
The outcome of the Gram stain is based on differences in the cell's
cell membrane
Correct!
cell wall
ribosomes
inclusions
Question 12
0.25 / 0.25 pts
Which of the following is not found in all bacterial cells?
ribosomes
cell membrane
Correct!
actin cytoskeleton
a nucleoid
Question 13
0.25 / 0.25 pts
The major locomotor structures in bacteria are
cilia
pili
fimbriae
Correct!
flagella
Question 14
0.25 / 0.25 pts
A prominent difference between prokaryotes and eukaryotes is the
lack of pigmentation in eukaryotes
presence of a cell wall in prokaryotes
larger size of prokaryotes
Correct!
presence of a nucleus in eukaryotes
Question 15
0.25 / 0.25 pts
Which of the following is present in both gram-positive and gram-negative cell walls?
teichoic acid
LPS
an outer membrane
Correct!
peptidoglycan
Question 16
0.25 / 0.25 pts
Which of the following is found in eukaryotic cells but NOT in prokaryotic cells?
nucleus
mitochondria
endoplasmic reticulum
Correct!
All choices are correct
Question 17
0.25 / 0.25 pts
Which structure is not a component of all cells?
ribosomes
genetic material
Correct!
cell wall
cell membrane
Question 18
0.25 / 0.25 pts
Which of the following is true of ribosomes?
Bacterial ribosomes are 70S, whereas archaeal and eukaryotic cytoplasmic ribosomes are 80S
Prokaryotic ribosomes are 80S, but eukaryotic cytoplasmic ribosomes are variable in size
All prokaryotic ribosomes are 70S and eukaryotic cytoplasmic ribosomes are 80S
Correct!
Organelle ribosomes and prokaryotic ribosomes are 70S, whereas eukaryotic cytoplasmic ribosomes are 80S
Question 19
0.25 / 0.25 pts
Which of the following prokaryotes lack cell wall?
Correct!
mycoplasma
archaea
Mycobacteria
rickettsias
Question 20
0.25 / 0.25 pts
Bacterial sporulation generally occurs under which of the following circumstances?
Correct!
when conditions are unfavorable or there are insufficient nutrients
when microbes are under little stress and can become dormant
when resources become highly abundant
when microbes are exposed to a new, favorable environment
Question 1
0.25 / 0.25 pts
Which of the following is present in both gram-positive and gram-negative cell walls?
an outer membrane
peptidoglycan
LPS
teichoic acid
Question 2
0.25 / 0.25 pts
The microorganisms that do NOT have a nucleus in their cells are called
decomposers
prokaryotes
eukaryotes
pathogens
Question 3
0.25 / 0.25 pts
A prominent difference between prokaryotes and eukaryotes is the
presence of a cell wall in prokaryotes
lack of pigmentation in eukaryotes
larger size of prokaryotes
presence of a nucleus in eukaryotes
Question 4
0.25 / 0.25 pts
The outcome of the Gram stain is based on differences in the cell's
inclusions
cell membrane
ribosomes
cell wall
Question 5
0.25 / 0.25 pts
All of the following are true about bacterial endospores EXCEPT
they are resistant to heat
they are seen in Bacillus and Clostridium sp.
their longevity ranges to immortality
they are a means of reproduction
Question 6
0.25 / 0.25 pts
Which of the following is true of ribosomes?
All prokaryotic ribosomes are 70S and eukaryotic cytoplasmic ribosomes are 80S
Prokaryotic ribosomes are 80S, but eukaryotic cytoplasmic ribosomes are variable in size
Bacterial ribosomes are 70S, whereas archaeal and eukaryotic cytoplasmic ribosomes are 80S
Organelle ribosomes and prokaryotic ribosomes are 70S, whereas eukaryotic cytoplasmic ribosomes are 80S
Question 7
0.25 / 0.25 pts
Bacterial endospores are NOT produced by
Bacillus
All of the choices are correct
Clostridium
Staphylococcus
Question 8
0.25 / 0.25 pts
An example of glycocalyx is
capsule
outer membrane
pili
a cell wall
Question 9
0.25 / 0.25 pts
The eukaryotic cell organelle that most resembles a bacterial cell is the
mitochondria
golgi apparatus
lysosome
nucleus
Question 10
0.25 / 0.25 pts
Bacterial endospores function in
survival
protein synthesis
reproduction
storage
Question 11
0.25 / 0.25 pts
Which of the following is a primary bacterial cell wall function?
support
adhesion
motility
transport
IncorrectQuestion 12
0 / 0.25 pts
The major difference between a spirochete and a spirillum is
size
the nature of motility
the presence of twists
presence of flagella
Question 13
0.25 / 0.25 pts
Which of the following is not found in all bacterial cells?
ribosomes
a nucleoid
actin cytoskeleton
cell membrane
Question 14
0.25 / 0.25 pts
The major locomotor structures in bacteria are
fimbriae
pili
cilia
flagella
Question 15
0.25 / 0.25 pts
Bacterial sporulation generally occurs under which of the following circumstances?
when resources become highly abundant
when microbes are exposed to a new, favorable environment
when conditions are unfavorable or there are insufficient nutrients
when microbes are under little stress and can become dormant
Question 16
0.25 / 0.25 pts
The site of protein synthesis in a eukaryotic cell is in the _________ and in prokaryotic cells is in the _______.
golgi apparatus, cell wall
mitochondria, cell membrane
cell membrane, cytoplasm
rough endoplasmic reticulum, cytoplasm
Question 17
0.25 / 0.25 pts
Bacteria use flagella to move purposefully toward or away from a chemical by which of the following?
having alternating runs and tumbles of equal lengths
increasing the length of tumbles and decreasing the length of runs
using only runs
increasing the length of runs and decreasing the length of tumbles
Question 18
0.25 / 0.25 pts
The most immediate result of destruction of a cell's ribosomes would be
destruction of the cell's DNA.
protein synthesis would stop
formation of glycogen inclusions
material would not be able to cross the cell membrane.
Question 19
0.25 / 0.25 pts
Which of the following is found in eukaryotic cells but NOT in prokaryotic cells?
endoplasmic reticulum
nucleus
mitochondria
All choices are correct
Question 20
0.25 / 0.25 pts
Which of the following is NOT a difference between endospores and vegetative cells?
Vegetative cells normally have enzyme activity, whereas endospores do not show enzymatic activity
Vegetative cells stain easily using normal staining protocols, whereas endospores are difficult to stain without special endospore stains
Vegetative cells are metabolically active, whereas endospores are dormant.
Vegetative cells are more resilient due to their metabolic activities, whereas endospores are more sensitive to change
Question 1
0.25 / 0.25 pts
The site of protein synthesis in a eukaryotic cell is in the _________ and in prokaryotic cells is in the _______.
mitochondria, cell membrane
cell membrane, cytoplasm
golgi apparatus, cell wall
rough endoplasmic reticulum, cytoplasm
IncorrectQuestion 2
0 / 0.25 pts
The major difference between a spirochete and a spirillum is
the presence of twists
size
presence of flagella
the nature of motility
IncorrectQuestion 3
0 / 0.25 pts
All of the following are true about bacterial endospores EXCEPT
they are seen in Bacillus and Clostridium sp.
they are a means of reproduction
they are resistant to heat
their longevity ranges to immortality
Question 4
0.25 / 0.25 pts
Bacterial endospores are NOT produced by
All of the choices are correct
Bacillus
Clostridium
Staphylococcus
IncorrectQuestion 5
0 / 0.25 pts
Which of the following is NOT a difference between endospores and vegetative cells?
Vegetative cells normally have enzyme activity, whereas endospores do not show enzymatic activity
Vegetative cells are more resilient due to their metabolic activities, whereas endospores are more sensitive to change
Vegetative cells stain easily using normal staining protocols, whereas endospores are difficult to stain without special endospore stains
Vegetative cells are metabolically active, whereas endospores are dormant.
IncorrectQuestion 6
0 / 0.25 pts
Which of the following is true of ribosomes?
Bacterial ribosomes are 70S, whereas archaeal and eukaryotic cytoplasmic ribosomes are 80S
Organelle ribosomes and prokaryotic ribosomes are 70S, whereas eukaryotic cytoplasmic ribosomes are 80S
All prokaryotic ribosomes are 70S and eukaryotic cytoplasmic ribosomes are 80S
Prokaryotic ribosomes are 80S, but eukaryotic cytoplasmic ribosomes are variable in size
IncorrectQuestion 7
0 / 0.25 pts
The LPS layer in gram-negative cell wall releases (?) that cause (?)
phosphates, lysis
enzymes, pain
endotoxin, fever
teichoic acid, inflammation
Question 8
0.25 / 0.25 pts
An example of glycocalyx is
outer membrane
capsule
a cell wall
pili
Question 9
0.25 / 0.25 pts
Bacteria use flagella to move purposefully toward or away from a chemical by which of the following?
increasing the length of tumbles and decreasing the length of runs
using only runs
increasing the length of runs and decreasing the length of tumbles
having alternating runs and tumbles of equal lengths
Question 10
0.25 / 0.25 pts
Bacterial endospores function in
survival
protein synthesis
reproduction
storage
Question 11
0.25 / 0.25 pts
Which of the following is a primary bacterial cell wall function?
transport
support
adhesion
motility
Question 12
0.25 / 0.25 pts
The most immediate result of destruction of a cell's ribosomes would be
protein synthesis would stop
destruction of the cell's DNA.
material would not be able to cross the cell membrane.
formation of glycogen inclusions
Question 13
0.25 / 0.25 pts
A prominent difference between prokaryotes and eukaryotes is the
lack of pigmentation in eukaryotes
larger size of prokaryotes
presence of a cell wall in prokaryotes
presence of a nucleus in eukaryotes
Question 14
0.25 / 0.25 pts
Which of the following is not found in all bacterial cells?
a nucleoid
actin cytoskeleton
cell membrane
ribosomes
Question 15
0.25 / 0.25 pts
The eukaryotic cell organelle that most resembles a bacterial cell is the
mitochondria
golgi apparatus
lysosome
nucleus
Question 16
0.25 / 0.25 pts
Which of the following prokaryotes lack cell wall?
rickettsias
archaea
mycoplasma
Mycobacteria
Question 17
0.25 / 0.25 pts
The outcome of the Gram stain is based on differences in the cell's
inclusions
ribosomes
cell wall
cell membrane
Question 18
0.25 / 0.25 pts
Which structure is not a component of all cells?
genetic material
ribosomes
cell membrane
cell wall
Question 19
0.25 / 0.25 pts
The microorganisms that do NOT have a nucleus in their cells are called
decomposers
prokaryotes
pathogens
eukaryotes
Question 20
0.25 / 0.25 pts
Which of the following is found in eukaryotic cells but NOT in prokaryotic cells?
mitochondria
nucleus
All choices are correct
endoplasmic reticulum