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Restriction enzymes are a very important discovery because it furthered our knowledge on bacterium. More importantly however, they have become a basic tool in biotechnology, allowing many more experiments to be conducted in the future.

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Restriction enzymes are enzymes isolated from bacteria that cut the DNA to produce fragments, called restriction fragments. Restriction enzymes play a very important role in the construction of recombinant DNA molecules, as is done in gene cloning experiments. Another application of restriction enzymes is to map the locations of restriction sites in DNA.

Source:

http://www.phschool.com/science/biology_place/biocoach/red/intro.html

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Today, restriction enzymes are also used by scientists to cut DNA strands for many things including DNA cloning and DNA finger printing.

Sources: http://biotechlearn.org.nz/themes/dna_lab/restriction_enzymes

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Scientists now know that the bacteria uses the restriction enzymes to kill various viruses by cutting up the viral DNA. It also allows us to further understand genetics because they're used in many various experiments.

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Restriction Enzymes were discovered and characterized in the late 1960s and early 1970s. The discovery was made in Switzerland, specifically at the University of Geneva, where Arber had attended.

Source: http://www.nature.com/scitable/spotlight/restriction-enzymes-18458113

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Many molecular biologists contributed to the discovery of restriction enzymes. Werner Arber first hypothesized that the enzymes bind and cut DNA at specific sites. Hamilton O. Smith then verified Arber's hypothesis. Daniel Nathans pioneered the application of restriction enzymes in biotechnology.

Source: http://www.nobelprize.org/nobel_prizes/medicine/laureates/1978/press.html

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By: Group 7: Matt, Myles, Tygan