MCB 100 Exam 2 (Lecture 11 start) Questions With Complete
Solutions
__________ is an antiphagocytic factor and helps S. pyogenes
attach to nose and throat cells. Correct Answers M protein
__________ is the treatment of choice for C. trachomatis.
Correct Answers Erythromycin
__________are the environmental reservoir for infection with
cryptococcus neoformans Correct Answers -birds
(Lecture 12) First step for bacteria to colonize Correct Answers
-Adherence (attachment to a surface at a particular site)
(Lecture 13)A strain of the Gram-negative bacterium Neisseria
gonorrheae, has a mutation that has caused the bacteria to lose
the ability to produce fimbriae and so it has become less
avirulent as a consequence. What function has this pathogen
lost? Correct Answers -it lost the ability to adhere to a cell
• Dimorphic fungi with two forms Correct Answers -usually
(but not always) at ambient temperatures (~25 degrees celsius
(room temp) ) they
grow as multicellular (multinuclear), filamentous molds, but at
body temperatures (37 degrees celsius) they
convert into unicellular pathogenic yeast forms
A five-year-old girl was admitted to the hospital with a
temperature of 103∘F and pain in her right hip. After pus was
surgically drained from the hip joint, she was treated with a
semisynthetic cephalosporin. He physicians changed the
,antibiotic regimen after 24 hour cultures of blood and pus
revealed the presence of MRSA. On the third day, she suffered
respiratory failure and empyema and was placed on mechanical
ventilation. She died from pulmonary hemorrhage and
pneumonia after five weeks of hospitalization. The girl had been
previously healthy with no recent hospitalizations. She had
skinned her knee while learning to ride a bicycle two days
before admittance to the hospital.
What was the most likely choice for the second antibiotic this
patient received? Correct Answers vancomycin
A toxin common to most Gram-negative bacteria is Correct
Answers -lipid A
A unicellular fungus is a ________, while masses of long,
intertwined fungal _________ are called ________ Correct
Answers yeast/hyphae/mycelia
AB type toxins are large proteins comprised of 2 functional
parts:
(1) An part (domain or subunit) with toxic (usually enzymatic)
activity Correct Answers -responsible for the observed cellular
outcomes.
AB type toxins are large proteins comprised of 2 functional
parts:
(2) A part (domain or subunit) that binds to receptors on the
surface of host cells and mediates the process of intoxication:
Correct Answers entry (cell uptake), trafficking (movement in
vesicles to
various cellular compartments such as late endosomes) and
getting the A part into the host cell cytosol (translocation of A
,part across the vesicle membrane), where the A part can gain
access to its target substrate and modify it.
Acne is the result of the inflammatory response. In this case, the
inflammation is resulting in acne that is very painful (physically
and emotionally) for Scott. However, inflammation is a critical
component of a normal immune response. What are the main
functions of the inflammatory response? Correct Answers
Repairing tissue damage resulting from inflammation
Destroying and eliminating the invading pathogen
"walling off" the site of injury or infection
Adhesins (attachment proteins) Correct Answers :bacterial cell-
surface components that facilitate adhesion or attachment to
surfaces or to proteins or sugars on other
bacterial or eukaryotic cells
Adhesion to specific cells or tissues leads the bacteria to have
cell or tissue tropism Correct Answers -preference for growth at
that location in the body or surface type.
AIDS is a what? Correct Answers syndrome
Algae (Lecture 15) Correct Answers -eukaryotic
photoautotrophs that are mostly aquatic (marine algae have
holdfasts to anchor to surfaces). They can be unicellular or
simple multicellular, but some can form communities
Algal cells and/or cyanobacterial cells are trapped by this in the
meshwork Correct Answers soredia
, All archaea have ________ ___________ Correct Answers -
cytoplasmic membranes.
• Maintain electrical and chemical gradients
• Control import and export of substances from the cell
All methanogens are ______ Correct Answers - archaea
All truly pathogenic fungi exist in the environment as molds but
grow in the body as spherical yeasts. This trait is known as
__________ Correct Answers dimorphism
Although cholera can be treated with antibiotics, data suggest
that antibiotic treatment alone is NOT the most effective
therapy. Which of the following statements describes the most
likely reason for supplementing antibiotic therapy? Correct
Answers Antibiotic therapy addresses only the growth of V.
cholerae; it doesn't address the extreme dehydration suffered by
a person infected with V. cholerae.
Although many people along the Mississippi, Missouri and Ohio
River valleys have been exposed and test positive for
histoplasmosis, most (95%) are asymptomatic. How do they
clear the organism from their bodies? Correct Answers cell-
mediated immunity
Although the proteins they transfer may be different, the type 3
secretion
systems of Escherichia coli, Salmonella, Shigella, and Yersinia
function
similarly in that they _______. Correct Answers -they transfer
bacterial proteins from the bacterium into the host cell.
Solutions
__________ is an antiphagocytic factor and helps S. pyogenes
attach to nose and throat cells. Correct Answers M protein
__________ is the treatment of choice for C. trachomatis.
Correct Answers Erythromycin
__________are the environmental reservoir for infection with
cryptococcus neoformans Correct Answers -birds
(Lecture 12) First step for bacteria to colonize Correct Answers
-Adherence (attachment to a surface at a particular site)
(Lecture 13)A strain of the Gram-negative bacterium Neisseria
gonorrheae, has a mutation that has caused the bacteria to lose
the ability to produce fimbriae and so it has become less
avirulent as a consequence. What function has this pathogen
lost? Correct Answers -it lost the ability to adhere to a cell
• Dimorphic fungi with two forms Correct Answers -usually
(but not always) at ambient temperatures (~25 degrees celsius
(room temp) ) they
grow as multicellular (multinuclear), filamentous molds, but at
body temperatures (37 degrees celsius) they
convert into unicellular pathogenic yeast forms
A five-year-old girl was admitted to the hospital with a
temperature of 103∘F and pain in her right hip. After pus was
surgically drained from the hip joint, she was treated with a
semisynthetic cephalosporin. He physicians changed the
,antibiotic regimen after 24 hour cultures of blood and pus
revealed the presence of MRSA. On the third day, she suffered
respiratory failure and empyema and was placed on mechanical
ventilation. She died from pulmonary hemorrhage and
pneumonia after five weeks of hospitalization. The girl had been
previously healthy with no recent hospitalizations. She had
skinned her knee while learning to ride a bicycle two days
before admittance to the hospital.
What was the most likely choice for the second antibiotic this
patient received? Correct Answers vancomycin
A toxin common to most Gram-negative bacteria is Correct
Answers -lipid A
A unicellular fungus is a ________, while masses of long,
intertwined fungal _________ are called ________ Correct
Answers yeast/hyphae/mycelia
AB type toxins are large proteins comprised of 2 functional
parts:
(1) An part (domain or subunit) with toxic (usually enzymatic)
activity Correct Answers -responsible for the observed cellular
outcomes.
AB type toxins are large proteins comprised of 2 functional
parts:
(2) A part (domain or subunit) that binds to receptors on the
surface of host cells and mediates the process of intoxication:
Correct Answers entry (cell uptake), trafficking (movement in
vesicles to
various cellular compartments such as late endosomes) and
getting the A part into the host cell cytosol (translocation of A
,part across the vesicle membrane), where the A part can gain
access to its target substrate and modify it.
Acne is the result of the inflammatory response. In this case, the
inflammation is resulting in acne that is very painful (physically
and emotionally) for Scott. However, inflammation is a critical
component of a normal immune response. What are the main
functions of the inflammatory response? Correct Answers
Repairing tissue damage resulting from inflammation
Destroying and eliminating the invading pathogen
"walling off" the site of injury or infection
Adhesins (attachment proteins) Correct Answers :bacterial cell-
surface components that facilitate adhesion or attachment to
surfaces or to proteins or sugars on other
bacterial or eukaryotic cells
Adhesion to specific cells or tissues leads the bacteria to have
cell or tissue tropism Correct Answers -preference for growth at
that location in the body or surface type.
AIDS is a what? Correct Answers syndrome
Algae (Lecture 15) Correct Answers -eukaryotic
photoautotrophs that are mostly aquatic (marine algae have
holdfasts to anchor to surfaces). They can be unicellular or
simple multicellular, but some can form communities
Algal cells and/or cyanobacterial cells are trapped by this in the
meshwork Correct Answers soredia
, All archaea have ________ ___________ Correct Answers -
cytoplasmic membranes.
• Maintain electrical and chemical gradients
• Control import and export of substances from the cell
All methanogens are ______ Correct Answers - archaea
All truly pathogenic fungi exist in the environment as molds but
grow in the body as spherical yeasts. This trait is known as
__________ Correct Answers dimorphism
Although cholera can be treated with antibiotics, data suggest
that antibiotic treatment alone is NOT the most effective
therapy. Which of the following statements describes the most
likely reason for supplementing antibiotic therapy? Correct
Answers Antibiotic therapy addresses only the growth of V.
cholerae; it doesn't address the extreme dehydration suffered by
a person infected with V. cholerae.
Although many people along the Mississippi, Missouri and Ohio
River valleys have been exposed and test positive for
histoplasmosis, most (95%) are asymptomatic. How do they
clear the organism from their bodies? Correct Answers cell-
mediated immunity
Although the proteins they transfer may be different, the type 3
secretion
systems of Escherichia coli, Salmonella, Shigella, and Yersinia
function
similarly in that they _______. Correct Answers -they transfer
bacterial proteins from the bacterium into the host cell.
