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ekmj ekmj
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6 years ago
Attenuation of the trp operon fails to occur when
 
  A) a lack of tryptophan causes stalling of ribosomes on the leader sequence of the RNA.
  B) an RNA stem-loop forms that allows transcription to continue.
  C) an RNA stem-loop that causes transcription to terminate fails to form.
  D) the cell has enough tryptophan.
  E) the operator is mutated.
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6 years ago
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