An example of a non-specific chemical barrier to infection is

a. unbroken skin
b. lysozyme in saliva
c. cilia in respiratory tract
d. all of these


Ans: b. lysozyme in saliva

Biology & Microbiology

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In the accompanying diagram, ____ is responsible for storing bile

a. F b. G c. H d. I e. J

Biology & Microbiology

Intestinal botulism, especially in infants, has been linked to ingestion of

A. seafood. B. milk. C. applesauce. D. honey.

Biology & Microbiology

The presence of long double-stranded RNA (> 30 bp)

A. indicates infection by an RNA virus other than a retrovirus. B. indicates infection by a virus. C. indicates exposure to mutagens. D. induces synthesis of interferon. E. indicates infection by an RNA virus other than a retrovirus AND induces synthesis of interferon.

Biology & Microbiology

All of the following are true of chronic fatigue syndrome EXCEPT

A) it may have a genetic component. B) it is also known as myalgic encephalomyelitis. C) it is a psychological disorder. D) it often begins with flu-like symptoms that do not go away. E) it may be triggered by a viral infection.

Biology & Microbiology