Practice question
Question
Which of the following is not used as a vector in molecular cloning?
Explanation
Hapten is a small molecule requiring carrier protein to evoke immune response and never serves as molecular cloning vehicle. Vectors like plasmid, cosmid, BAC replicate foreign DNA inside host cells, providing origin of replication, selectable marker and cloning sites. Haptens belong to immunology, not recombinant DNA technology.
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