In attenuation control of the bacterial trp operon, what happens when tryptophan is abundant?

• A. The ribosome quickly translates the leader peptide, forming a terminator hairpin and terminating transcription.
• B. The ribosome stalls at tryptophan codons, allowing an anti-terminator and continued transcription.
• C. RNA polymerase initiates transcription but cannot terminate because tryptophan is abundant.
• D. The leader peptide is not translated and transcription proceeds without delay.

Answer: (A)