Up to 70% of travel-associated gastrointestinal diseases are caused by

A. enterotoxigenic strains of E. coli.
B. Salmonella.
C. Shigella dysenteriae.
D. E. coli 0157:H7.
E. enteroinvasive E. coli.


Ans: A. enterotoxigenic strains of E. coli.

Biology & Microbiology

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Proteins contain both acidic and basic R groups and can, therefore, function as

A. energy storage macromolecules. B. structural macromolecules. C. buffers. D. catalysts. E. genetic material.

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In the single circulation of a fish, _______ and _________ are present.

A. one atrium, one ventricle B. two atria, one ventricle C. two atria, two ventricles D. one atrium, two ventricles E. no atrium, one ventricle

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Which of the following describes flash pasteurization?

A) heating at 63°C for 30 minutes B) heating at 72°C for 15 seconds C) heating at 72°C for 15 minutes D) heating at 134°C for one second E) passing liquid through steam at 140°C

Biology & Microbiology