Recombinant DNA
What is the normal role of restriction endonucleases in bacterial cells?

All of these
To degrade invading phage DNA
To produce RNA primers for replication
To degrade the bacterial chromosome into small pieces during replication

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Recombinant DNA
Agrobacterium tumefaciens is

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

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