Recombinant DNA Technology
Restriction enzymes

protect bacteria from viral infection
cut DNA in a staggered fashion
cut DNAs producing a blunt end
All of these

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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
Restriction sites allow DNAs to be digested
Known protein coding sequences are too far apart to allow linkage determination for most new genes
None of these

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Recombinant DNA Technology
An example of a restriction fragment length polymorphism is

All of these
different length fragments of DNA resulting from loss or gain of a restriction site
cystic fibrosis results from a three base deletion in most cases but in other cases, other mutations are involved
an Eco RI cuts DNA at a different sequence than Hind III

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