Question

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

Explanation:

DNA is present in both prokaryotic and eukaryotic cells. Cell membranes and ribosomes are also found in both types of cells. However, the nucleus is a membrane - bound organelle that is unique to eukaryotic cells. Prokaryotic cells lack a true nucleus and have their DNA in the nucleoid region.

Answer:

nucleus