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

ANSWER DOWNLOAD EXAMIANS APP

Recombinant DNA Technology
An expression vector

usually contains a gene that confers antibiotic resistance to the bacterial host
always contains DNA segments for the regulation of mRNA production
All of these
always contains an origin of replication

ANSWER DOWNLOAD EXAMIANS APP