Molecular Genetics

Molecular Genetics - Molecular Genetics I. Basic...

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I. Basic recombinant DNA technology How has recombinant DNA technology led to advances in genetic engineering? Recombinant DNA technology involves the splicing of DNA from different organisms. This technology enables scientists to obtain many copies of specific DNA segment for the purpose of studying it. Genetic engineering involves the modification of the DNA of an organism to produce new genes with new traits. With the use of recombinant DNA technology, scientists are able to identify which DNA segments correspond to an organism’s traits. A. Tools from Bacteria 1. Restriction enzymes (Fig. 15-1) Why do some bacteria produce specific restriction enzymes? Some bacteria produce specific restriction enzymes to fight infection by a bacteriophage. The bacterium can defend itself by employing the restriction enzymes it has produce to attack the bacteriophage DNA that has been injected into it. What is a bacteriophage? A bacteriophage is a virus that infects bacteria. 2. Plasmids Why do some bacteria have plasmids? Bacteria have plasmids because they carry genes that are useful under specific environmental conditions, such as genes that provide resistance to antibiotics or let the bacteria use a specific nutrient. What is a vector molecule?
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Molecular Genetics - Molecular Genetics I. Basic...

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