Microbiology Chapter 14 Test
Bank Questions And Answers
A commensal bacterium
A) does not receive any benefit from its host.
B) is beneficial to its host.
C) may also be an opportunistic pathogen.
D) isn't capable of causing disease in its host.
E) always causes disease in its host. - Answer ✔✔ - may also be an
opportunistic pathogen
Which of the following statements is TRUE?
A) Both members are harmed in a symbiotic relationship.
B) Members of a symbiotic relationship cannot live without each other.
C) A parasite is not in symbiosis with its host.
D) Symbiosis always refers to different organisms living together and
benefiting from each other.
E) At least one member must benefit in a symbiotic relationship. - Answer
✔✔ - at least one member must benefit in a symbiotic relationship
A nosocomial infection is
A) always present, but is inapparent at the time of hospitalization.
B) acquired during the course of hospitalization.
C) always caused by medical personnel.
D) only a result of surgery.
E) always caused by pathogenic bacteria - Answer ✔✔ - acquired during the
course of hospitalization
The major significance of Robert Koch's work is that
A) microorganisms are present in a diseased animal.
, B) diseases can be transmitted from one animal to another.
C) microorganisms can be cultured.
D) microorganisms cause disease.
E) microorganisms are the result of disease - Answer ✔✔ - microorganisms
cause diesease
Which of the following is NOT a verified exception in the use of Koch's
postulates?
A) Some diseases have poorly defined etiologies.
B) Some pathogens can cause several disease conditions.
C) Some human diseases have no other known animal host.
D) Some diseases are not caused by microbes.
E) Some diseases are noncommunicable - Answer ✔✔ - some diseases are
noncommunicable
Which of the following diseases is NOT spread by droplet infection?
A) botulism
B) tuberculosis
C) measles
D) the common cold
E) diphtheria - Answer ✔✔ - botulism
Biological transmission differs from mechanical transmission in that
biological transmission
A) occurs when a pathogen is carried on the feet of an insect.
B) involves fomites.
C) involves reproduction of a pathogen in an arthropod vector prior to
transmission.
D) requires direct contact.
E) works only with noncommunicable diseases - Answer ✔✔ - involves
reproduction of a pathogen in an arthropod vector prior to transmission
Which of the following definitions is INCORRECT?
A) endemic: a disease that is constantly present in a population
Bank Questions And Answers
A commensal bacterium
A) does not receive any benefit from its host.
B) is beneficial to its host.
C) may also be an opportunistic pathogen.
D) isn't capable of causing disease in its host.
E) always causes disease in its host. - Answer ✔✔ - may also be an
opportunistic pathogen
Which of the following statements is TRUE?
A) Both members are harmed in a symbiotic relationship.
B) Members of a symbiotic relationship cannot live without each other.
C) A parasite is not in symbiosis with its host.
D) Symbiosis always refers to different organisms living together and
benefiting from each other.
E) At least one member must benefit in a symbiotic relationship. - Answer
✔✔ - at least one member must benefit in a symbiotic relationship
A nosocomial infection is
A) always present, but is inapparent at the time of hospitalization.
B) acquired during the course of hospitalization.
C) always caused by medical personnel.
D) only a result of surgery.
E) always caused by pathogenic bacteria - Answer ✔✔ - acquired during the
course of hospitalization
The major significance of Robert Koch's work is that
A) microorganisms are present in a diseased animal.
, B) diseases can be transmitted from one animal to another.
C) microorganisms can be cultured.
D) microorganisms cause disease.
E) microorganisms are the result of disease - Answer ✔✔ - microorganisms
cause diesease
Which of the following is NOT a verified exception in the use of Koch's
postulates?
A) Some diseases have poorly defined etiologies.
B) Some pathogens can cause several disease conditions.
C) Some human diseases have no other known animal host.
D) Some diseases are not caused by microbes.
E) Some diseases are noncommunicable - Answer ✔✔ - some diseases are
noncommunicable
Which of the following diseases is NOT spread by droplet infection?
A) botulism
B) tuberculosis
C) measles
D) the common cold
E) diphtheria - Answer ✔✔ - botulism
Biological transmission differs from mechanical transmission in that
biological transmission
A) occurs when a pathogen is carried on the feet of an insect.
B) involves fomites.
C) involves reproduction of a pathogen in an arthropod vector prior to
transmission.
D) requires direct contact.
E) works only with noncommunicable diseases - Answer ✔✔ - involves
reproduction of a pathogen in an arthropod vector prior to transmission
Which of the following definitions is INCORRECT?
A) endemic: a disease that is constantly present in a population
