Question

What is the main characteristic that distinguishes prokaryotes from eukaryotes?

Answer 1

The main characteristic that distinguishes prokaryotes from eukaryotes is the presence of a defined nucleus. Prokaryotes, such as bacteria and archaea, do not have a membrane-bound nucleus; their genetic material is typically organized in a single, circular DNA molecule that is located in a region called the nucleoid. In contrast, eukaryotes, which include animals, plants, fungi, and protists, have a true nucleus that is enclosed by a nuclear membrane, as well as other membrane-bound organelles. This structural difference is fundamental to the organization and function of these two groups of organisms.