Gene Expression
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| activation genes | (blank)
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| enhancer | a region agjacent to a eukaryotic gene that must be activated if the gene is to be expressed
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| euchromatin | the uncoiled form of a chromatin
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| exon | coding region of a eukaryotic gene
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| gene expression | the transcription of DNA to RNA and then into proteins
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| genome | the complete genetic material contained in an individual
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| inducer | in the lac operon, the molecule that binds to repressor molecules and induces gene expression
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| intron | a section of a structural gene that does not code for an amino acid and is excised before translation
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| lac operon | DNA segment that codes for the regulatory enzymes for lactose metabolism in E. coli
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| operon | a unit of DNA common in bacteria and phages consisitng of clusters of regulated genes
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| pre-mRNA | a form of mRNA that contains introns and exons
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| regulator gene | a genetic unit that regulates or suppresses the activity of one or more structural genes
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| repression | the blockage of transcription by the action of a repressor protein
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| repressor protein | a protein that inhabits a specific gene form being expressed
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| strucural gene | genes that code for particular polypeptides
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| transcription factor | additional proteins that bind to to enhancers and RNA polymerase and regulate transcription
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