An operator and transcription unit are called an operon
Indicate whether the statement is true or false.
T
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Outside a cell, viruses are
A. running a small number of biochemical reactions. B. synthesizing proteins necessary for entry into the host. C. inactive. D. constructing a cell membrane known as an envelope. E. running a small number of biochemical reactions AND synthesizing proteins necessary for entry into the host.
The type of inflammation of the gum in which bacteria grow in pockets between the gums and the teeth and in which teeth may become loose is called ________
Fill in the blank(s) with correct word
Vaccinations were first invented using cowpox to protect against smallpox in the 1700s
a. true b. false
The feature of "sticky ends" that makes them especially useful in DNA recombination is their ability to
A) bind to DNA and thereby activate transcription. B) bind to ribosomes and thereby activate translation. C) form hydrogen-bonded base pairs with complementary single-stranded stretches of DNA. D) allow plasmids to attach to the main bacterial chromosome.