The description you provided is a bit tricky! It's impossible for a cell to have DNA but no nucleus. Here's why:

* DNA is housed within the nucleus. The nucleus is the control center of the cell and contains the cell's genetic material (DNA).

* Flagella, ribosomes, cytoplasm, and a membrane are essential components of most cells. These structures are found in both prokaryotic and eukaryotic cells.

Here's a breakdown of what might be confusing you:

* Prokaryotic cells are simpler cells that lack a nucleus and other membrane-bound organelles. Their DNA is located in a region called the nucleoid, but it's not enclosed by a membrane like a nucleus.

* Eukaryotic cells are more complex cells that have a true nucleus, as well as other membrane-bound organelles.

So, what could be the cell you're thinking of?

It's likely you're thinking of a prokaryotic cell. These cells do have DNA, but it's not enclosed in a nucleus. They also have flagella, ribosomes, cytoplasm, and a membrane.

Here's a summary of prokaryotic cell features:

* DNA: Present, but not enclosed in a nucleus.

* Nucleus: Absent

* Flagella: Present in some prokaryotes (used for movement)

* Ribosomes: Present (smaller than those in eukaryotic cells)

* Cytoplasm: Present (the gel-like substance inside the cell)

* Membrane: Present (surrounds the cell)

Let me know if you have any other questions!