In order to study transcriptional regulation and attenuation in the tryptophan operon, the UGG codons for tryptophan in the trp leader mRNA sequence were mutated into UUG codons. Using this altered trp operon, please answer the following questions.

a) Under what conditions would the operon initiate transcription?

b) Under what conditions would the attenuation take place?

c) Under what conditions would transcription continue through to the end of the operon?