How Does the Lac Repressor Inhibit Transcription

question 38

Multiple Choice

How does the lac repressor inhibit transcription?

• A) It binds to the RNA polymerase and prevents its association to the DNA.
• B) It binds to the DNA and prevents the RNA polymerase from unwinding and transcribing the DNA.
• C) It binds to RNA polymerase and causes a frame shift, thus producing an mRNA with a nonsense mutation.
• D) It binds to the mRNA molecule, preventing ribosomes from binding.
• E) None of the answers is correct.

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