The defining structural feature that separates eukaryotic cells from prokaryotic cells is
Athe presence of ribosomes
Bthe presence of DNA
Cthe presence of cytoplasm
Da membrane-bound nucleus
Answer & Solution
Correct answer: D. a membrane-bound nucleus
Both cell types have DNA, ribosomes, cytoplasm and a plasma membrane. What sets eukaryotes apart is the **membrane-bound nucleus** and the suite of membrane-bound organelles (ER, Golgi, mitochondria, etc.) that follow from it.
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