Operons
A) control the expression of constitutive genes.
B) are subject to positive or to negative control.
C) are not affected by mutations in the genes for repressors or inducers.
D) occur in both prokaryotes and eukaryotes.

Question

Quizplus · Accepted Answer

Operons are indeed subject to either positive or negative control, depending on whether the presence of a specific molecule (such as an inducer or a co-repressor) increases (positive control) or decreases (negative control) the expression of the genes within the operon. This system is a fundamental aspect of gene regulation in prokaryotes.