Recombinant DNA
The Southern blotting technique depends on

similarities between the sequences of probe DNA and experimental DNA
similarities between the sequences of probe protein and experimental protein
similarities between the sequences of probe RNA and experimental RNA
the molecular mass of proteins

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Recombinant DNA
Vectors are

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

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

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

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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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