An operon is
A) a molecule that can turn genes on and off.
B) an inducer bound to a repressor.
C) a series of regulatory sequences controlling transcription of protein-coding genes.
D) any long sequence of DNA.
E) a promoter, an operator, and a group of linked structural genes.

Question

Quizplus · Accepted Answer

An operon is a set of genes under the control of a single promoter and operator, which together coordinate the expression of multiple genes involved in a particular metabolic pathway. The operon typically includes structural genes that code for enzymes required for the pathway, along with regulatory regions that control their expression. The structure of the operon allows for coordinated control of gene expression in response to environmental changes, such as the presence or absence of specific nutrients.

An Operon Is