How would transcription of the E. coli trp operon be affected by increasing the

Question

How would transcription of the E. coli trp operon be affected by increasing the distance (number of bases) between the stop codon in region 1 and the start of region 2?

A) increased attenuation and thus decreased transcription

B)decreased attenuation and thus increased transcription

C) no attenuation, and thus transcription would proceed at the maximum level

A) increased attenuation and thus decreased transcription

B)decreased attenuation and thus increased transcription

C) no attenuation, and thus transcription would proceed at the maximum level

Explanation / Answer

Less attenuation of transcription. The ribosome completing the translation of sequence 1 would no longer overlap and block sequence 2. Sequence 2 would always be available to pair with sequence 3, preventing formation of the attenuator structure. Option b is the correct answer.

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