Recombinant DNA
Vectors are

molecules that protect host cells from invasion by foreign DNA
molecules that help in replication
molecules that degrade nucleic acids
molecules that are able to covalently bond to and carry foreign DNA into cells

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

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

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Recombinant DNA
Electroporation is

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

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