A plasmid contains a multiple cloning site inside the coding region of the lacZ gene and also contains an ampicillin resistance gene at a separate locus. When cells are transformed with a successfully recombinant plasmid containing a piece of DNA cloned
into the multiple cloning site, what color will the colonies be when grown on an agar plate containing ampicillin and X-gal?
A) blue
B) colonies will not grow
C) green
D) clear
E) white
Answer: E
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Egg cells are fertilized in the
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A city was intensively sprayed with the chemical DDT to control houseflies. The number of houseflies was immediately greatly reduced
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A(n) __________ is a noncellular infectious particle with a protein coat enclosing DNA or RNA.
Fill in the blank(s) with the appropriate word(s).