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

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

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Recombinant DNA
Agrobacterium tumefaciens is

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

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Recombinant DNA
The Southern blotting technique depends on

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

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