Q11 of 44 Page 75

An antibiotic resistance gene in a vector usually helps in the selection of:

•Antibiotic resistance genes act as selectable markers.


•In the host cell DNA, when gene of interest gets incorporated, the host cell is called transformant.


•Antibiotic resistance gene like PVU [Ampicillin resistance gene] is used to distinguish between transformants and non-transformants.

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Which of the following contributed in popularising the PCR (polymerase chain reactions) technique?

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The role of DNA ligase in the construction of a recombinant DNA molecule is: