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Biology 20 Online
OpenStudy (anonymous):

@aaronq Explain how the repressor molecule would stop a gene from being expressed.

OpenStudy (aaronq):

In a operon (e.g. Lac operon) a repressor molecule physically obstructs the path of polymerase and impedes mRNA transcription to occur.

OpenStudy (aaronq):

by binding to a section (promoter) of the gene.

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