Recombinant DNA
Vectors are

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

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Recombinant DNA
The Southern blotting technique depends on

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

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Recombinant DNA
Agrobacterium tumefaciens is

a disease in humans that causes loss of sight
a disease in humans that causes loss of weight
a fungi that is used to produce antibiotics in large amounts
a bacterium that can be used to introduce DNA into plants

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