Which description best characterizes eukaryotic cells?

• A. Simple cells with no nucleus
• B. Lack membrane-bound organelles
• C. Lack DNA
• D. Complex cells with a nucleus and DNA inside

Answer: (D)

Eukaryotic cells are defined by their compartmentalized structure, with DNA housed inside a membrane-bound nucleus and a variety of membrane-bound organelles performing specialized tasks. This organization enables more complex regulation of gene expression and metabolism. The description that best matches this is: they are complex cells with a nucleus and DNA inside. This distinguishes them from simpler cells that lack a nucleus and membrane-bound organelles, where DNA isn’t enclosed in a nucleus.