Recombinant DNA
Enzymes that recognize and cleave specific 4 to 8 base pair sequences of DNA are

DNA ligase
DNA gyrase
restriction endonucleases
helicases

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Recombinant DNA
Vectors are

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

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Recombinant DNA
Agrobacterium tumefaciens is

a disease in humans that causes loss of weight
a fungi that is used to produce antibiotics in large amounts
a bacterium that can be used to introduce DNA into plants
a disease in humans that causes loss of sight

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