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Recombinant DNA is force to enter the host cells by incubating the cells with rDNA firstA. On ice followed by heat shock and then again on iceB. At low temperature followed by heat shock and then on iceC. In ethidium bromide followed by calcium saltsD. Into chilled ethanol followed by ice and then into CsCl

Answer» Correct Answer - a
The host cells with r-DNA are first subjected to ice followed by heat shoch `(42^(@)C)` and then to ice. As a result, rDNA molcules are easily introduced into the host cells. This process is called transformation.


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