A potential drug for the treatment of prion disease would be
a. a protease because prions are made only of protein.
b. a ribonuclease because prions are made only of nucleic acid.
c. a nucleoside inhibitor to prevent formation of new nucleotides.
d. none of the above.
Answer: A
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Enrichment cultures can be established by placing the inoculum into selective media and incubating under specific conditions
Indicate whether the statement is true or false.
You thinly slice a carrot root and place the slices on a medium containing nutrients and hormones necessary for plant growth. After a few weeks, you see that there are many little entire carrot plants growing from the root slices. The cells in the root can give rise to an entire plant because many plant cells are
A. totipotent B. unipotent C. embryonic D. pluripotent E. semipotent
The greatest concentration of nitrogen on earth
is found in
a. living organisms, including bacteria. b. the atmosphere. c. soil minerals. d. fossil fuels. e. oceans.
The food supply of a population is one example of its ____
a. carrying capacity b. limiting factors c. immigration controls d. density-limiting controls e. density-independent controls