08_lac_OPERON

08_lac_OPERON - THE lac OPERON 2007 Paul Billiet ODWS The...

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THE lac OPERON © 2007 Paul Billiet ODWS
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The control of gene expression Each cell in the human contains all the genetic material for the growth and development of a human Some of these genes will be need to be expressed all the time These are the genes that are involved in of vital biochemical processes such as respiration Other genes are not expressed all the time They are switched on an off at need © 2007 Paul Billiet ODWS
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Operons An operon is a group of genes that are transcribed at the same time . They usually control an important biochemical process. They are only found in prokaryotes . © NobelPrize.org © 2007 Paul Billiet ODWS
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The lac Operon The lac operon consists of three genes each involved in processing the sugar lactose One of them is the gene for the enzyme β- galactosidase This enzyme hydrolyses lactose into glucose and galactose © 2007 Paul Billiet ODWS
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Adapting to the environment E. coli can use either glucose, which is a monosaccharide, or lactose, which is a
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08_lac_OPERON - THE lac OPERON 2007 Paul Billiet ODWS The...

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