The correct answer is: B. DNA
DNA is a molecule that contains the genetic instructions for all living things. It is found in the nucleus of eukaryotic cells and in the cytoplasm of prokaryotic cells.
A nucleus is a membrane-bound organelle that contains the cell’s DNA. It is found in eukaryotic cells, but not in prokaryotic cells.
A nuclear membrane is a double membrane that surrounds the nucleus. It is found in eukaryotic cells, but not in prokaryotic cells.
Membrane-bound organelles are organelles that are surrounded by a membrane. They are found in eukaryotic cells, but not in prokaryotic cells.
In conclusion, the only feature that prokaryotic and eukaryotic cells share is DNA.