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

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

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Recombinant DNA
The Southern blotting technique depends on

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

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Recombinant DNA
Agrobacterium tumefaciens is

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

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