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

helicases
DNA gyrase
DNA ligase
restriction endonucleases

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Recombinant DNA
Agrobacterium tumefaciens is

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
a disease in humans that causes loss of weight

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Recombinant DNA
Electroporation is

the process of multiplication of the cells
the process of combining foreign DNA to an electrically charged vector molecule
the application of high voltage pulses
the process of separating charged molecules through a gel maintained in an electric field

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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
having anti restriction endonucleases
not producing any restriction endonucleases

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