Recombinant DNA Technology
An expression vector

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

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Recombinant DNA Technology
Isoschizomers recognize

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

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