What are prokaryotes?

What are prokaryotes?

• A. Organisms with nucleus and are usually multicellular
• B. Organisms with no nucleus and are usually single-celled
• C. Organisms with nucleus and mitochondria
• D. Organisms lacking DNA

Answer: (B)

Prokaryotes are organisms that do not have a true nucleus. Their genetic material sits in a region called the nucleoid, not inside a membrane-bound nucleus. They are typically single-celled and lack many membrane-bound organelles such as mitochondria. This is why the description that fits prokaryotes is organisms with no nucleus and are usually single-celled. Remember, though, that they still contain DNA, just not enclosed by a nucleus, and they can have other small DNA circles called plasmids. The other statements describe eukaryotes or are biologically false.

Prokaryotes are organisms that do not have a true nucleus. Their genetic material sits in a region called the nucleoid, not inside a membrane-bound nucleus. They are typically single-celled and lack many membrane-bound organelles such as mitochondria. This is why the description that fits prokaryotes is organisms with no nucleus and are usually single-celled. Remember, though, that they still contain DNA, just not enclosed by a nucleus, and they can have other small DNA circles called plasmids. The other statements describe eukaryotes or are biologically false.