Recombinant DNA
In genetic engineering, a chimera is

a virus that infects bacteria
a plasmid that contains foreign DNA
a fungi
an enzyme that links DNA molecules

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

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

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