If a Mutation Prevents the Formation of the Antiterminator 2+3

question 14

Multiple Choice

If a mutation prevents the formation of the antiterminator 2+3 loop in the trp operon, what would be the effect?

• A) transcription only when tryptophan is absent
• B) transcription only when tryptophan is present
• C) constitutive attenuation of transcription
• D) constitutive transcription
• E) no effect, as 2+3 loop has no function

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