Plague transmitted by a flea is an example of what?
A. Vector
B. Direct contact
C. Droplet transmission
D. Fomite
E. Vehicle transmission
Ans: A. Vector
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A codon is composed of how many bases?
A. one B. two C. three D. four E. 64
During the process of gel electrophoresis, the DNA fragments migrate due to the effects of ____
a. gravity b. vibrations c. electrical charge d. magnetic attraction e. centrifugal force
Compounds of tin, mercury, arsenic, and copper are no longer used to prevent microbial growth in cooling water primarily because
A. antibiotics are cheaper. B. other chemicals were shown to be much more effective. C. microbes developed resistance to these metals. D. their use contributes to serious pollution of natural waters. E. All of the choices are correct.
Which of these literature search methods will NOT narrow the search?
A. "AND" B. "NOT" C. Using truncation D. Adding a date range to your search E. Using more keywords