What is the difference between prokaryotic and eukaryotic cells regarding nucleus presence?

What is the difference between prokaryotic and eukaryotic cells regarding nucleus presence?

• A. Prokaryotes have multiple nuclei
• B. Nuclei are present in both equally
• C. Both lack a nucleus
• D. Eukaryotes have a true nucleus; prokaryotes do not

Answer: (D)

The difference hinges on the presence of a nucleus, a membrane-bound compartment that houses DNA and controls gene expression. In eukaryotes, this true nucleus is enclosed by a double membrane with nuclear pores, keeping DNA separate from the rest of the cell’s interior. Prokaryotes, on the other hand, do not have a membrane around their DNA; their genetic material lies in a region called the nucleoid within the cytoplasm, so there is no true nucleus. This is why the correct description is that eukaryotes have a true nucleus, while prokaryotes do not. The other statements misrepresent the presence or absence of a nucleus in these cell types.

The difference hinges on the presence of a nucleus, a membrane-bound compartment that houses DNA and controls gene expression. In eukaryotes, this true nucleus is enclosed by a double membrane with nuclear pores, keeping DNA separate from the rest of the cell’s interior. Prokaryotes, on the other hand, do not have a membrane around their DNA; their genetic material lies in a region called the nucleoid within the cytoplasm, so there is no true nucleus. This is why the correct description is that eukaryotes have a true nucleus, while prokaryotes do not. The other statements misrepresent the presence or absence of a nucleus in these cell types.