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

Biology & Microbiology

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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.

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Summarize the results of one of the first investigations of the genetics of skin color

What will be an ideal response?

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An infectious RNA molecule is a

A. virion. B. bacteriophage. C. virus. D. prion. E. viroid.

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Secretion occurs mainly in the:a

distal convoluted tubule. b. loop of Henle. c. proximal convoluted tubule. d. collecting duct. e. glomerulus

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