Recombinant DNA Technology
An expression vector

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
always contains an origin of replication

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

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

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