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

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

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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 disease in humans that causes loss of sight
a fungi that is used to produce antibiotics in large amounts

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Recombinant DNA
A genomic library is

a book that describes how to isolate DNA from a particular organism
a place where the information of the genetic organization of organisms are kept.
a collection of many clones possessing different DNA fragments from the same organisms bound to vectors
a database where the sequence of an organism's genome is stored

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