Using the website linked below, summarize how gene expression in prokaryotes is controlled?Include :- - The Lac Operon of E. coli and the trp...

Using the website linked below, summarize how gene expression in prokaryotes is controlled?

Include :-

- The Lac Operon of E. coli and the trp Operon of E. coli.

Website -

http://themedicalbiochemistrypage.org/gene-regulation.html

Expert Answers
M.P. Ossa eNotes educator| Certified Educator

Gene expression is the name commonly given to the process of gene production of active proteins. This process is much simpler in prokaryotes than in eukaryotes. The reason for this is that the manner in which information is transmitted for cloning and producing the active protein is the main focal activity of it. What this means is that the processes of copying (transmission) and spreading out (translation) are more consistent in prokaryotes. Contrastingly, eukaryotes have nuclear membranes which protect each element from each other, making the process more complex.

According the research, prokaryotes divide their mode of transcription and translation into two operons, or operations, which are the Lac and the trp operons. Carbolite-regulated operons, which are found in prokaryotes, produce gene products that use up the most amount of energy. This would be the lac operon. The second operon breaks down small bio molecules and amminoacids. This would be the trp operon. On EColi, the Lac would obtain the energy to break the genetic code of the bacteria down through TRP.

The lac operon of EColi occurs when the repressor of the operon is transmitted from a gene called the i gene. The protein that comes out of this represor sticks to the part of the operon that does not let the polymerase of the RNA transcribe the operon. This repressor is interceptedf by the inducer, and becomes inactive. The Camp receptor protein will bind to sequences near the operon, and it becomes regulated.

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