Recombinant DNA Technology
An expression vector

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

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Recombinant DNA Technology
Which of the following is correct in terms of determination of location of genetic traits?

Known protein coding sequences are too far apart to allow linkage determination for most new genes
Restriction sites allow DNAs to be digested
Protein-coding genes are always associated with a restriction pattern
None of these

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