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

polymerase chain reaction
southern blotting
northern blotting
DNA replication

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Recombinant DNA
Vectors are

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

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