In an effort to determine the mechanism of transcriptional regulation of a proka

Question

In an effort to determine the mechanism of transcriptional regulation of a prokaryotic operon, you have made a series of deletions within the putative regulatory region. The extent of each deletion is shown by the line underneath the sequence, and the resulting expression from the operon (i = inducible; c= constitutive; - = no expression) is also indicated. (Note that "inducible" is the wild-type phenotype.). .. GGATCTTAGCCGGCTAACATGATAAATATAA. ... .. CCT AGAATCGGCCGATTGT ACT ATTTATATT. .. What is 1 likely to be: A. operator B. enhancer C. attenuator D. promoter E. inducer F. None

Explanation / Answer

From the above results , we can conclude that 1 is likely to be ---- F. none.

Because in the cases of 1,3 and 5 inspite of the deletion of the ....CCTA region, the expression was inducible and constitutive.

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