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The remaining pieces of mRNA

The remaining pieces of mRNA - bacteria In these...

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The remaining pieces of mRNA, called  exons , are then spliced to  form the final mRNA molecule.  Thus, through removal of introns and the retention of exons, the cell  can alter the message received from the DNA and control gene  expression. The concept of gene control has been researched thoroughly in 
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Unformatted text preview: bacteria. In these microorganisms, genes have been identified as structural genes, regulator genes, and control genes (or control regions). The three units form a functional unit called the operon....
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