The drug metronidazole is effective on both bacteria and some protozoa. It can therefore be described as a ________ drug.
A. narrow spectrum
B. broad spectrum
C. full spectrum
D. general spectrum
E. specific spectrum
Answer: B
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Insulators:
A. are boundary elements that function to prevent the enhancer for one gene from activating the promoter of another gene. B. are DNA sequences that can prevent packaging of a gene into heterochromatin. C. require the zinc-finger protein CTCF to function in higher eukaryotes. D. All of the choices are correct.
Summarize the results of one of the first investigations of the genetics of skin color
What will be an ideal response?
An infectious RNA molecule is a
A. virion. B. bacteriophage. C. virus. D. prion. E. viroid.
Secretion occurs mainly in the:a
distal convoluted tubule. b. loop of Henle. c. proximal convoluted tubule. d. collecting duct. e. glomerulus