Recombinant DNA Technology
The transfer of antibiotic-resistant genes from genetically engineered bacteria to disease-causing bacteria __________ .

would be of no concern if it occurred.
can never occur
seems unlikely
has occurred

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Recombinant DNA Technology
A human cDNA library

contains DNA for specific human proteins
cannot be used to obtain human genes because it would be radioactive
None of these
contains DNA for virtually all of the human proteins in vectors

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