Here's why:

* No Nucleus: Unlike eukaryotic cells, bacteria lack a true nucleus.

* Circular DNA: Bacterial DNA is a single, circular molecule.

* Nucleoid Region: The nucleoid is a region within the cytoplasm where the bacterial DNA is located. It's not a membrane-bound organelle, but rather a concentrated area of DNA.

So, while bacteria don't have a nucleus like eukaryotic cells, the nucleoid is where their genetic information resides.