A transport receptor that moves macromolecules from the cytoplasm to the nucleus is called a(n) ____.
a) importin
b) receptin
c) exhalin
d) transportin
e) exportin
Ans: a) importin
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Antibody-producing cells in humans are called ________
A) macrophages B) plasma cells C) T cells D) NK cells E) hybridoma cells
When comparing the number of protons and electrons, a neutral atom has _____
the same number of electrons and protons fewer protons than electrons fewer electrons than protons twice as many protons as electrons
Mannitol salt agar (MSA) only allows the growth of halophiles (salt-loving microbes); nonhalophiles will not grow. Among the halophiles, mannitol fermenters will produce acid that turns the pH indicator yellow; mannitol nonfermenters leave the medium red. Onto MSA you inoculate a halophilic mannitol fermenter and a halophilic mannitol nonfermenter. In this case, the medium is acting as (a) ________ medium(s).
A. differential B. enrichment C. selective D. selective and differential
In polymerase chain reaction technology, the two strands of DNA are separated by:
a. gel electrophoresis. b. treatment with restriction enzymes. c. centrifugation. d. exposure to high pH. e. exposure to heat.