To which of the following repressor protein is attached

Operator

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Inducer

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Promoter

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Structural gene

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Solution

The correct option is B Operator
In molecular genetics, a repressor is a DNA or RNA binding protein that inhibits the expression of one or more genes by binding to the operator or associated silencers. A DNA-binding repressor blocks the attachment of RNA polymerase to the promoter, thus preventing transcription of the genes into messenger RNA.
Hence the correct answer is option A.

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