 
             
            Transcription - Medical Science
| Q1:  A level of regulation, demonstrated by the termination of transcription if tryptophan is abundant, by the tryptophan operon in E.coli cells is calledA 
activation
  B 
attenuation
  C 
corepression
  D 
desiccation
  ANS:B - attenuation I believe the answer should be corepression because the tryptophan act as a co-repressor to shut the transcription (termination). | 
 
             
                            
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