Which type of cells do not possess membrane-enclosed organelles?

Prokaryotic cells are characterized by the absence of membrane-enclosed organelles. These cells, which include bacteria and archaea, have a simpler cell structure compared to eukaryotic cells. In prokaryotic cells, the genetic material is not enclosed within a nucleus; instead, it is found in a region called the nucleoid, which lacks a surrounding membrane. Additionally, prokaryotic cells do not have organelles such as mitochondria, endoplasmic reticulum, or Golgi apparatus, which are all enclosed by membranes in eukaryotic cells.

In contrast, eukaryotic cells have complex structures, including various organelles that perform distinct functions, all separated by membranes. This distinction is crucial in understanding the fundamental differences in cell organization and function between the two types of cells. Therefore, the identification of prokaryotic cells as lacking membrane-enclosed organelles is correct and highlights a key aspect of cellular biology.