MCB 100 Exam 3 UPDATED ACTUAL Questions And Correct Answers
C
Terms in this set (39)
Which of the following is not a symptom of disease? D
a. headache
b. dizziness
c. nausea
d. fever
e. cramps
Which of the following is not a sign of disease? B
a. fever
b. dizziness
c. swelling
d. diarrhea
e. rash
What steps should a researcher take to establish a cause- E
and-effect relationship between a pathogen and a lethal
human illness?
a. identify the causative pathogen
b. obtain the pathogen from the disease outbreak
patients
c. infect uninfected people and see if it causes similar
disease
d. a, b and c
e. a and b only
Which of the following would make it not possible to A
satisfy all of Koch's postulates for a particular microbe?
a. the microbe cannot be isolated in pure culture
b. the microbe only infects nonhuman animals
c. the microbe does not cause the same symptoms in all
patients
d. the identity of the microbe is in question
e. the microbe's DNA can be PCR amplified from all
tissues where diseases has been observed
, A commensal E. coli strain usually found as part of the
normal gut microbe of chickens has a pillion gene (pil1)
that is responsible for attaching and colonizing chicken
intestines. A clinical isolate of this E. coli strain recently
isolated from sick pigs appears to have a new pillion
gene (pil2) that now allows for infection in pigs. How
could you must directly test this hypothesis?
a. make a mutation in the pil1 gene and see if the
bacterium is still virulent in both pigs and chickens
b. make a mutation in the pil2 gene and see if the
bacterium is still virulent in both pigs and chickens
c. make a mutation in the pil2 gene and see if the
bacterium is still virulent in chickens, but not pigs
d. make a mutation in the pil2 gene and see if the
bacterium is still virulent in pigs, but not in chickens
e. make a mutation in the pil1 gene and see if the
bacterium is still virulent in chickens, but not in pigs
Carriers are dangerous because they exhibit all of the D
following except:
a. they do not show signs of infection
b. they are unaware that they are spreading disease
c. they are difficult to identify and quarantine
d. they are symptomatic for infection
e. they are more common in a population that most
people think
Which of the following is not a characteristic associate E
with animal reservoirs?
a. an animal reservoir is naturally infected with the
pathogen
b. animal behaviors are more difficult to control than
human behaviors
c. animal reservoirs maintain the presence of the
pathogen over time
d. an animal reservoir can transmit the disease to a new
susceptible host
e. animal reservoirs are easier to eradicate than human
reservoirs
Which of the following would be considered a virulence B
factor of a pathogen?
a. the ability of a virus to become a provirus
b. a surface protein that allows the pathogen to bind to
host cells
c. a secondary host that the pathogen can also infect
d. a surface protein that the host immune system
recognizes
e. the ability of a fungus to form and release conidia
(spores)
C
Terms in this set (39)
Which of the following is not a symptom of disease? D
a. headache
b. dizziness
c. nausea
d. fever
e. cramps
Which of the following is not a sign of disease? B
a. fever
b. dizziness
c. swelling
d. diarrhea
e. rash
What steps should a researcher take to establish a cause- E
and-effect relationship between a pathogen and a lethal
human illness?
a. identify the causative pathogen
b. obtain the pathogen from the disease outbreak
patients
c. infect uninfected people and see if it causes similar
disease
d. a, b and c
e. a and b only
Which of the following would make it not possible to A
satisfy all of Koch's postulates for a particular microbe?
a. the microbe cannot be isolated in pure culture
b. the microbe only infects nonhuman animals
c. the microbe does not cause the same symptoms in all
patients
d. the identity of the microbe is in question
e. the microbe's DNA can be PCR amplified from all
tissues where diseases has been observed
, A commensal E. coli strain usually found as part of the
normal gut microbe of chickens has a pillion gene (pil1)
that is responsible for attaching and colonizing chicken
intestines. A clinical isolate of this E. coli strain recently
isolated from sick pigs appears to have a new pillion
gene (pil2) that now allows for infection in pigs. How
could you must directly test this hypothesis?
a. make a mutation in the pil1 gene and see if the
bacterium is still virulent in both pigs and chickens
b. make a mutation in the pil2 gene and see if the
bacterium is still virulent in both pigs and chickens
c. make a mutation in the pil2 gene and see if the
bacterium is still virulent in chickens, but not pigs
d. make a mutation in the pil2 gene and see if the
bacterium is still virulent in pigs, but not in chickens
e. make a mutation in the pil1 gene and see if the
bacterium is still virulent in chickens, but not in pigs
Carriers are dangerous because they exhibit all of the D
following except:
a. they do not show signs of infection
b. they are unaware that they are spreading disease
c. they are difficult to identify and quarantine
d. they are symptomatic for infection
e. they are more common in a population that most
people think
Which of the following is not a characteristic associate E
with animal reservoirs?
a. an animal reservoir is naturally infected with the
pathogen
b. animal behaviors are more difficult to control than
human behaviors
c. animal reservoirs maintain the presence of the
pathogen over time
d. an animal reservoir can transmit the disease to a new
susceptible host
e. animal reservoirs are easier to eradicate than human
reservoirs
Which of the following would be considered a virulence B
factor of a pathogen?
a. the ability of a virus to become a provirus
b. a surface protein that allows the pathogen to bind to
host cells
c. a secondary host that the pathogen can also infect
d. a surface protein that the host immune system
recognizes
e. the ability of a fungus to form and release conidia
(spores)
