C HAPTER 25: M ICROBIAL I NFECTION AND
P ATHOGENESIS
Test Bank for Brock Biology of Microorganism 16th Edition by Michael T.
Madigan
25.1 Multiple Choice Questions
1. Pathogenicit y is the abilit y
A) of the host to inflict damage on the pathogen.
B) of the host to resist damage by the pathogen.
C) of the pathogen to inflict damage on the host.
D) None of these are correct.
2. An outer coat consisting of a dense, well -defined pol ymer layer
surrounding a cell and used in attachment is called a
A) capsule.
B) cytoplasmic membrane.
C) lipopol ysaccharide layer.
D) pilus.
3. Capsules are particularl y important for
A) making bacteria more vulnerable to host defense mechanisms.
B) making bacteria less pathogenic.
C) protecting bacteria from host defense mechanisms.
D) allowing bacteria to become more phagocytic.
4. Which of the following is a n important factor in the development of dental
caries?
, A) high salt diet
B) high sugar diet
C) high acid diet
D) low salt diet
5. Which of the following is NOT an example of an AB toxin?
A) shiga-like toxin
B) hemol ysins
C) botulinum toxin
D) tetanus toxin
6. ________ in saliva cleaves gl ycosidic linkages in the peptidogl ycan that is
present in bacterial cell walls, weakening the wall and potentiall y causing
cell l ysis.
A) Mucus
B) Lysoz yme
C) Fibrin
D) Lipid A
7. _________ is a damage or injury to a host organism that impairs its
function.
A) Trauma
B) Infection
C) Disease
D) Transmission
8. Pathogenicit y and virulence differ in that
A) pathogenicit y refers to the overall abilit y of a microbe to cause
disease, whereas virulence refers to the abilit y of one microbe to
cause disease relative to another.
P ATHOGENESIS
Test Bank for Brock Biology of Microorganism 16th Edition by Michael T.
Madigan
25.1 Multiple Choice Questions
1. Pathogenicit y is the abilit y
A) of the host to inflict damage on the pathogen.
B) of the host to resist damage by the pathogen.
C) of the pathogen to inflict damage on the host.
D) None of these are correct.
2. An outer coat consisting of a dense, well -defined pol ymer layer
surrounding a cell and used in attachment is called a
A) capsule.
B) cytoplasmic membrane.
C) lipopol ysaccharide layer.
D) pilus.
3. Capsules are particularl y important for
A) making bacteria more vulnerable to host defense mechanisms.
B) making bacteria less pathogenic.
C) protecting bacteria from host defense mechanisms.
D) allowing bacteria to become more phagocytic.
4. Which of the following is a n important factor in the development of dental
caries?
, A) high salt diet
B) high sugar diet
C) high acid diet
D) low salt diet
5. Which of the following is NOT an example of an AB toxin?
A) shiga-like toxin
B) hemol ysins
C) botulinum toxin
D) tetanus toxin
6. ________ in saliva cleaves gl ycosidic linkages in the peptidogl ycan that is
present in bacterial cell walls, weakening the wall and potentiall y causing
cell l ysis.
A) Mucus
B) Lysoz yme
C) Fibrin
D) Lipid A
7. _________ is a damage or injury to a host organism that impairs its
function.
A) Trauma
B) Infection
C) Disease
D) Transmission
8. Pathogenicit y and virulence differ in that
A) pathogenicit y refers to the overall abilit y of a microbe to cause
disease, whereas virulence refers to the abilit y of one microbe to
cause disease relative to another.
