The restriction enzyme used in constructing hybrid molecules of certain gene sequences and plasmid DNA acts by
A. transcribing plasmid DNA into a transformed molecule.
B. opening DNA molecules at specific sites, leaving sticky ends exposed.
C. binding human genes to bacterial plasmids.
D. allowing a hybrid plasmid DNA into a transformed molecule.
E. sealing plasmid DNA and foreign DNA into a closed circle.
Ans: B. opening DNA molecules at specific sites, leaving sticky ends exposed.
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