Recombinant DNA
Agrobacterium tumefaciens is

a disease in humans that causes loss of weight
a disease in humans that causes loss of sight
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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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
not producing any restriction endonucleases
having anti restriction endonucleases

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Recombinant DNA
A genomic library is

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

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Recombinant DNA
Vectors are

molecules that protect host cells from invasion by foreign DNA
molecules that are able to covalently bond to and carry foreign DNA into cells
molecules that degrade nucleic acids
molecules that help in replication

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