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

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

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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 bacterium that can be used to introduce DNA into plants
a fungi that is used to produce antibiotics in large amounts

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