The category of "savory" is a recent addition to the classic sweet, sour, bitter and salty categories in human taste. Which of the following best describes the basic requirement for the identification of a new taste?
A. identification of a different type of taste bud
B. identification of a new set of interneurons
C. isolation of a novel chemoreceptor
D. isolation of a novel chemical compound in
a food
C
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The two-stage thymic selection process for selecting self-tolerant, antigen-reactive T cells results in
A) allelic exclusion. B) clonal deletion. C) complementarity-determining regions. D) somatic hypermutation.
The activity of the ribosome in translation is
like a(n)
a. assembly line. b. dance. c. planet racing around the sun. d. foot race. e. chess game
The ____ form of Plasmodium is transferred to humans through the bite of an infected mosquito
a. merozoite b. gametocyte c. cyst d. sporozoite e. spore
Which of the following infectious agents is least likely to be damaged by UV exposure?
bacteria viruses fungi protozoa prions