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mahi mahi
wrote...
Posts: 650
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6 years ago
When the cellular level of tryptophan decreases in E. coli:
 
  a. tryptophan-bound Trp repressor associates with trp operator.
  b. Trp aporepressor has lowered affinity for trp promoter allowing RNA. polymerase binding and transcription of the trp operon.
  c. tryptophan binds trp inducer to promote positive control of trp promoter.
  d. trp repressor has a greater affinity for trp operator.
  e. none of the above.
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wrote...
6 years ago
ANSWER: b
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