Recombinant DNA
Charged molecules are separated based on varying rates of migration through a solid matrix when subjected to an electric field. This technique is known as

autoradiography
photoreactivation
gel electrophoresis
blotting

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Recombinant DNA
The Southern blotting technique depends on

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

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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 weight
a disease in humans that causes loss of sight
a bacterium that can be used to introduce DNA into plants

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

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

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