Recombinant DNA
A molecular technique in which DNA sequences between two oligonucleotide primers can be amplified is known as

southern blotting
DNA replication
polymerase chain reaction
northern blotting

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

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

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