Sets of genes in operons are coordinately regulated by all of the following EXCEPT:
A) protein repressors
B) activators
C) sigma factors
D) small RNAs
E) irreversible changes in the DNA sequence

Question

Quizplus · Accepted Answer

Operons are sets of genes that are transcribed into a single mRNA molecule, and their expression is coordinated by regulatory elements such as protein repressors, activators, sigma factors, and small RNAs. However, irreversible changes in the DNA sequence, such as mutations or deletions, can disrupt the regulation of operons but are not considered regulatory elements. Therefore, E is the best answer.

Sets of Genes in Operons Are Coordinately Regulated by All