* Ribosomes: These are essential for protein synthesis. While they have a different structure, they both contain rRNA and proteins.

* Plasma membrane: This membrane encloses the cell, regulating what enters and exits.

* Cytoplasm: This is the gel-like substance within the cell where many metabolic reactions occur.

* DNA: Both types of cells contain DNA as their genetic material, although the way it's organized and packaged differs.

It's important to remember that prokaryotic cells lack a nucleus and other membrane-bound organelles found in eukaryotic cells, such as the Golgi apparatus, endoplasmic reticulum, mitochondria, lysosomes, etc.