Question

Which of the following statements regarding the regulation of trp operon expression by attenuation is correct?

(a) Rapid translation of the leader peptide prevents completion of mRNA transcript

(b) Rapid translation of the leader peptide allows completion of mRNA transcript

(c) The leader peptide sequence encodes enzymes required for tryptophan synthesis

(d) The leader peptide sequence contains no tryptophan residues

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Question is taken from Regulation of Gene Expression in Prokaryotes-1 topic in portion Regulation of Gene Expression and Miscellaneous of Biochemistry

Answer 1

The correct choice is (a) Rapid translation of the leader peptide prevents completion of mRNA transcript

The explanation: Attenuation results in premature termination of transcription.