Escherichia Coli : A Type Of A Host ( Credoreferences ) Essay

819 Words Sep 30th, 2016 4 Pages
Let’s start the introduction by talking about our main target, Escherichia coli or how it is mostly unknown, E.coli, are a diverse and large group of bacteria found food, the environment, and in the intestinal tracts of humans and animals were it normally inhabits and it can also cause infection in other parts of the body, especially the urinary tract. Its name was given by a German physician called Theodor Escherich and it is the most common member of the genus Escherichia. E.coli is “a Gram-negative, rod-shaped bacterium propelled by long, rapidly rotating flagella” (CredoReferences). It can be also found in water and soil. E.coli is of great use in laboratory research and categorized as one of the most thoroughly studied form of life. It is used for gene splicing techniques in order to clone genes as the preferred microorganism for the use of a host (CredoReferences).
Moving to another important concept: plasmids, they are small DNA molecules than can replicate independently, thus having a great contribution and being a perfect tool in biotechnology and genetics laboratories. They are on really high demand in medical applications. Also, “a plasmid is an accessory chromosomal DNA that is naturally present in bacteria. Some bacteria cells can have no plasmids or several copies of one” (WikiBooks). The host chromosome is not needed for their replication. They are doubled stranded and circular and carry few genes. Their genes have different functions such as production of…

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