Which of the following provides the best description of a difference between prokaryotic and eukaryotic cells? A)Eukaryotic cells have cell walls that consist mainly of sugars, while prokaryotic cells do not. B)Prokaryotic cells contain chloroplasts and mitochondria, while eukaryotic cells do not contain specialized organelles. C)The cell membrane of prokaryotic cells contains proteins, while the cell membrane of eukaryotic cells contains only lipids and carbohydrates. D)The DNA in eukaryotic cells is enclosed in the nucleus, while the DNA in prokaryotic cells is not separated from the rest of the cell’s contents.

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Hmmm... the choices are quite ambiguous but the answer should be D. Prokaryotes don't have nucleus. 

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