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

DNA replication
northern blotting
southern blotting
polymerase chain reaction

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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
not producing any restriction endonucleases
having anti restriction endonucleases
methylating the DNA at the sites that the enzyme recognizes

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Recombinant DNA
The Southern blotting technique depends on

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

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