Antimicrobial peptides called ________ are secreted in sweat and damage bacteria and fungi.
A. antibodies
B. dermcidins
C. TLRs
D. complement factors
E. cytokines
Answer: B
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Activation of the IFN-? globin promoter is an example of a histone code. Of the steps given, which is the third in this process?
A. The TATA box in the promoter is exposed. B. Complexes containing Gcn5 bind to the promoter and acetylate nearby nucleosomes. C. A chromatin remodeling complex such as SW1/SNF binds to and moves the nucleosome. D. Initiation of transcription occurs. E. A protein kinase binds to the Gcn5 complex and phosphorylates nearby nucleosomes.
Which of the following is incorrect regarding Yersinia pestis?
A. It produces coagulase as a virulence factor. B. It has a capsule as a virulence factor. C. It produces an enterotoxin. D. It exhibits bipolar staining and appears to resemble a safety pin. E. It is a gram-negative rod.
One map unit is equal to a recombination frequency of
A) 1%. B) 5%. C) 10%. D) 50%. E) 100%.
Why can measles virus and poxvirus infect many human tissues and influenza virus can infect only
one type of tissue? What will be an ideal response?