A) It is used to ligate introduced DNA in recipient cells
B) It serves as a selectable marker
C) It is isolated from a virus
D) It remains active at high temperature
Correct Answer: D
Solution :
Polymerase Chain Reaction (PCR) is used to amplify a DNA segment or to synthesize in vitro the multiple copies of gene (or DNA) of interest, using two sets of primers and the enzyme DNA polymerase. This enzyme is isolated from a bacterium Thermus aquaticus and it remains active during the high temperature but high temperature induced denaturation of double stranded DNA.
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