Question 1

Which characterizes interferons?

Accepted Answer

A)  They are produced by natural killer cells. 
B)  They lyse virus-infected cells. 
C)  They are involved in innate but not adaptive defense responses. 
D)  They inhibit viral reproduction in neighboring cells, should they become infected. 
E)  They are antibody signaling proteins. 
A)  They are produced by natural killer cells. 
B)  They lyse virus-infected cells. 
C)  They are involved in innate but not adaptive defense responses. 
D)  They inhibit viral reproduction in neighboring cells, should they become infected. 
E)  They are antibody signaling proteins.

Question 2

If you were to design a vaccine to prevent infection from a mucosal pathogen such as Vibrio cholerae, which antibody class do you think would be most effective in preventing colonization in the intestinal tract?

Accepted Answer

A)  IgA 
B)  IgD 
C)  IgE 
D)  IgG 
E)  IgM 
A)  IgA 
B)  IgD 
C)  IgE 
D)  IgG 
E)  IgM

Question 3

Serum from guinea pigs injected with less than a lethal dose of diphtheria toxin

Accepted Answer

A)  contains a factor that protects other guinea pigs from a lethal dose of the same toxin. 
B)  contains a factor that protects other guinea pigs from a lethal dose of diphtheria toxin and a toxin from a different bacterium. 
C)  contains a factor that protects other guinea pigs from a lethal dose of toxin from a different strain of diphtheria-causing bacteria. 
D)  conveys active immunity to guinea pigs injected with it. 
E)  conveys cellular immunity to guinea pigs injected with it. 
A)  contains a factor that protects other guinea pigs from a lethal dose of the same toxin. 
B)  contains a factor that protects other guinea pigs from a lethal dose of diphtheria toxin and a toxin from a different bacterium. 
C)  contains a factor that protects other guinea pigs from a lethal dose of toxin from a different strain of diphtheria-causing bacteria. 
D)  conveys active immunity to guinea pigs injected with it. 
E)  conveys cellular immunity to guinea pigs injected with it.

Question 4

What might be the consequence of a mutation that disables or impairs the function of an enzyme responsible for VDJ supergene assembly?

Accepted Answer

Problems with VDJ supergene as

Question 5

Which defense is most likely to be provided by complement proteins?

Accepted Answer

A)  Lysing of invading cells 
B)  Deactivation of the inflammation response 
C)  Insertion of nitric oxide into microbes 
D)  Production of interferons 
E)  Promotion of genetic recombination 
A)  Lysing of invading cells 
B)  Deactivation of the inflammation response 
C)  Insertion of nitric oxide into microbes 
D)  Production of interferons 
E)  Promotion of genetic recombination

Exam 41: Immunology: Animal Defense Systems

Which characterizes interferons?

If you were to design a vaccine to prevent infection from a mucosal pathogen such as Vibrio cholerae, which antibody class do you think would be most effective in preventing colonization in the intestinal tract?

Serum from guinea pigs injected with less than a lethal dose of diphtheria toxin

What might be the consequence of a mutation that disables or impairs the function of an enzyme responsible for VDJ supergene assembly?

Which defense is most likely to be provided by complement proteins?

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