In a plasmid vector, the purpose of the lacZ gene is
a. to allow replication of the plasmid.
b. to allow selection of transformed bacterial cells.
c. to allow the plasmid to be cut once for cloning a fragment.
d. to protect the plasmid from digestion by exonucleases.
e. as an indicator that the plasmid is recombinant, containing a DNA insert.
Ans: e
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What will be an ideal response?
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