An operon is a useful genetic element, because it
A) encourages the binding of RNA polymerase.
B) allows coordinated expression of multiple related genes in prokaryotes.
C) translates DNA sequence into amino acid sequence.
D) encourages the binding of ribosomes in the correct location.

Question

Quizplus · Accepted Answer

An operon is a group of genes that are controlled by a single promoter and operator region. This allows for coordinated regulation of gene expression in prokaryotes, where there is often a need for rapid response to changing environmental conditions. The operon structure also allows for efficient transcription by promoting the binding of RNA polymerase to the promoter region.

Answer: A
 The operon structure includes a promoter region that RNA polymerase binds to in order to initiate transcription of the operon genes. This efficient binding allows for coordinated expression of the genes under the control of the same promoter region.

Therefore, both A and B can be considered correct answers.

An Operon Is a Useful Genetic Element, Because It