Recombinant DNA
The advantage of using DNA polymerases from thermophilic organisms in PCR is that

the DNA polymerases of these bacteria can withstand the high temperatures needed to denature the DNA strands
All of these
the DNA polymerases of these bacteria never make mistakes while replicating DNA
the DNA polymerases of these bacteria are much faster than those from other organisms

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

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

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Recombinant DNA
Vectors are

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

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Recombinant DNA
Electroporation is

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

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