Question

which structure is unique to eukaryotic cells?
dna
cell membrane
ribosomes
nucleus

Explanation:

DNA is found in both prokaryotic and eukaryotic cells. The cell - membrane is a common feature of all cells. Ribosomes are present in both types of cells for protein synthesis. However, a nucleus, which is a membrane - bound organelle housing the cell's genetic material, is unique to eukaryotic cells. Prokaryotic cells have a nucleoid region instead of a true nucleus.

Answer:

nucleus