Inducible and repressible systems are similar in that in both systems the regulatory molecules function by binding to the operator.
An operon is a structural group of genes that are expressed or controlled by a single promoter and is considered the functional unit of genomic DNA.
This question is multiple choice:
a) both systems usually control catabolic pathways.
b) both systems usually control biosynthetic pathways.
c) both systems block transcription through the presence of a regulatory protein.
d) both systems are unique to prokaryotes.
e) in both systems the regulatory molecules function by binding to the operator.
So, the true choice is E.
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