An operon is ________.
A)a set of genes whose transcription is controlled by a single promoter
B)the site of repressor binding
C)a protein that activates the transcription of a whole class of genes
D)a multisubunit complex responsible for the splicing of exons

Question

Quizplus · Accepted Answer

An operon is a set of genes that are transcribed together as a single mRNA molecule under the control of a single promoter. The genes in an operon usually encode proteins with related functions, such as enzymes in a metabolic pathway. The regulation of the operon can be controlled by various factors, including regulatory proteins, small molecules, or environmental signals. The concept of the operon was first proposed by Jacob and Monod in the 1960s, based on their studies of the lac operon in E. coli.

An Operon Is ________