When the Cellular Level of Tryptophan Decreases in E

question 5

Multiple Choice

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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