Recombinant DNA
Which of the following enzyme is used to covalently bond foreign DNA to a vector plasmid?

DNA helicase
DNA polymerase
DNA ligase
Restriction endonuclease

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Recombinant DNA
Bacterial cells protect their own DNA from degradation by restriction endonucleases by

having anti restriction endonucleases
deleting all recognition sites from the genome
not producing any restriction endonucleases
methylating the DNA at the sites that the enzyme recognizes

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Recombinant DNA
The Southern blotting technique depends on

similarities between the sequences of probe protein and experimental protein
similarities between the sequences of probe RNA and experimental RNA
similarities between the sequences of probe DNA and experimental DNA
the molecular mass of proteins

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Recombinant DNA
Agrobacterium tumefaciens is

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
a disease in humans that causes loss of weight

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