A bacterial ________ is the nontranscribed region of the DNA to which RNA polymerase binds in order to initiate transcription.

A. initiator
B. operator
C. operon
D. promoter


Answer: D

Biology & Microbiology

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Which of the following is not a camouflage device?

a. chromatophores b. iridophores c. thigmotaxis d. obliterative countershading

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Cytokines released by white blood cells that activate T cells and B cells, provoke an inflammatory response, and induce fever are called

A. histamines. B. complement proteins. C. interleukins. D. interferons. E. epinephrines.

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The definition of lysogeny is

A) phage DNA is incorporated into host cell DNA. B) lysis of the host cell due to a phage. C) the period during replication when virions are not present. D) when the burst time takes an unusually long time. E) attachment of a phage to a cell.

Biology & Microbiology