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 help in replication
molecules that degrade nucleic acids

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Recombinant DNA
A genomic library is

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.
a book that describes how to isolate DNA from a particular organism
a collection of many clones possessing different DNA fragments from the same organisms bound to vectors

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