Here's a bit more detail:

* Eukaryotic cells (cells with a nucleus) have their DNA neatly packaged within the nucleus. This DNA is organized into structures called chromosomes.

* Prokaryotic cells (cells without a nucleus) have their DNA located in a region called the nucleoid. The nucleoid is not enclosed by a membrane, but the DNA is still concentrated in this area.

Let me know if you have any other questions about DNA!