What is the relationship between operons and transcription units?
A) They are synonymous terms.
B) An operon consists of a transcription unit plus associated regulatory DNA sequences.
C) A transcription unit consists of an operon plus associated regulatory DNA sequences.
D) An operon is composed of multiple transcription units.
E) A transcription unit is composed of multiple operons.

Question

Quizplus · Accepted Answer

An operon is a functional unit of DNA containing a cluster of genes under the control of a single promoter and is regulated together, which includes not only the genes but also regulatory sequences such as promoters and operators. A transcription unit refers to the stretch of DNA that is transcribed into an RNA molecule, which can be part of an operon. Thus, an operon includes a transcription unit(s) along with its regulatory sequences.

What Is the Relationship Between Operons and Transcription Units