A section of a bacterial chromosome in which genes for the enzymes of a particular metabolic pathway are clustered together in a functional complex under coordinate control is called a(n)______.
A)operator
B)operon
C)promoter
D)repressor
E)activator

Question

Quizplus · Accepted Answer

An operon is a section of bacterial DNA that contains a cluster of genes involved in a specific metabolic pathway, which are controlled by a single promoter and operator. The genes within an operon are transcribed together into a single mRNA molecule, which is then translated into proteins that function together as a functional complex. This coordinated regulation allows bacteria to efficiently control the expression of genes involved in the same process. Operators, promoters, repressors, and activators are all regulatory elements involved in the control of gene expression within operons.

A Section of a Bacterial Chromosome in Which Genes for the Enzymes