Recombinant DNA
Which of the following enzyme is used to covalently bond foreign DNA to a vector plasmid?

Restriction endonuclease
DNA helicase
DNA ligase
DNA polymerase

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Recombinant DNA
Electroporation is

the process of combining foreign DNA to an electrically charged vector molecule
the application of high voltage pulses
the process of separating charged molecules through a gel maintained in an electric field
the process of multiplication of the cells

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Recombinant DNA
Bacterial cells protect their own DNA from degradation by restriction endonucleases by

deleting all recognition sites from the genome
having anti restriction endonucleases
not producing any restriction endonucleases
methylating the DNA at the sites that the enzyme recognizes

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