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

DNA helicase
Restriction endonuclease
DNA ligase
DNA polymerase

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

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

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

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