How Does the Lactose Repressor Block Transcription of the Lactose

question 55

Multiple Choice

How does the lactose repressor block transcription of the lactose operon?

• A) by "turning off" the lacA intron
• B) by degrading the lacZ protein product
• C) by binding allosterically to the lacZ gene
• D) by slowing the uptake of lactose into the cell
• E) by binding to the operator

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