Here's why:

* Prokaryotic structure: Bacteria are prokaryotes, meaning they lack a nucleus and other membrane-bound organelles. Their DNA is located in a region called the nucleoid, which is not enclosed by a membrane.

* Circular chromosome: Bacterial DNA is typically organized as a single, circular chromosome. This chromosome contains all the essential genes for the bacteria to survive and reproduce.

* Operons: Genes in bacteria are often organized into operons. An operon is a group of functionally related genes that are transcribed together as a single unit, controlled by a single promoter. This allows for coordinated regulation of related genes.

Contrast with Eukaryotes:

In contrast to bacteria, eukaryotic genes are often split into segments called exons and introns. Introns are non-coding regions that are removed during RNA processing, leaving only the exons to be translated into protein.