For a Repressible Operon to Be Transcribed, Which of the Following

question 97

Multiple Choice

For a repressible operon to be transcribed, which of the following must occur?

• A) A corepressor must be present.
• B) RNA polymerase and the active repressor must be present.
• C) RNA polymerase must bind to the promoter, and the repressor must be inactive.
• D) RNA polymerase cannot be present, and the repressor must be inactive.
• E) RNA polymerase must not occupy the promoter, and the repressor must be inactive.

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