Recombinant DNA Technology
Knockout mice are created by

infecting the mouse with a retrovirus
mutagenizing a mouse and selecting for mutant offspring
transfecting embryonic stem cells with an altered gene sequence
creating a chimera by fusing cells from two different cell lines

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Recombinant DNA Technology
Isoschizomers recognize

same recognition site and recognition sequence
same recognition site and different recognition sequence
same recognition sequence but different recognition site
different recognition site and different recognition sequence

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Recombinant DNA Technology
A human cDNA library

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

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