Which Item Below is Unique to Eukaryotic Cells

Question

Which item below is unique to eukaryotic cells?  
A) Cell wall
B) Plasma membrane
C) Nucleoid
D) Ribosomes
E) Vacuole

Accepted Answer

Vacuoles are unique to eukaryotic cells and are membrane-bound organelles that store water, nutrients, and waste products. A is incorrect because some prokaryotes have cell walls; B is incorrect because both prokaryotes and eukaryotes have plasma membranes; C is incorrect because nucleoids are found in prokaryotes instead of true nuclei found in eukaryotes; D is incorrect because ribosomes are present in both prokaryotes and eukaryotes, although they may differ in size and structure.