Which is a feature of prokaryotic cells but NOT eukaryotic cells?
Question options:
A) fimbriae
B) cell wall
C) flagella
D) ribosomes
Fimbriae
To identify the feature that is specific to prokaryotic cells, but not found in eukaryotic cells, we need to understand the characteristics of both types of cells.
Prokaryotic cells are simpler and more primitive, typically found in bacteria and archaea. They lack a defined nucleus and membrane-bound organelles. On the other hand, eukaryotic cells are more complex and typically found in plants, animals, fungi, and protists. They have a well-defined nucleus and various membrane-bound organelles.
Now, let's examine the options:
A) Fimbriae: Fimbriae are short, hair-like structures that help bacteria to attach to surfaces. Both prokaryotic and eukaryotic cells can have structures that aid in attachment, but fimbriae are primarily found in prokaryotic cells. Therefore, fimbriae can be found in both prokaryotic and eukaryotic cells.
B) Cell wall: The cell wall is a rigid layer that surrounds the cell membrane and provides structural support. While prokaryotic cells typically have a cell wall made of peptidoglycan, not all eukaryotic cells have a cell wall. For example, animal cells do not have a cell wall but instead have an extracellular matrix. However, many eukaryotic cells, such as plant and fungi cells, do have a cell wall composed of different materials, such as cellulose or chitin. Therefore, cell wall can be found in both prokaryotic and certain eukaryotic cells.
C) Flagella: Flagella are whip-like structures that allow cells to move. While both prokaryotic and eukaryotic cells can have flagella, there are some differences in their structure. However, flagella can be found in both prokaryotic and certain eukaryotic cells.
D) Ribosomes: Ribosomes are responsible for protein synthesis. They can be found in both prokaryotic and eukaryotic cells, and the basic structure and function of ribosomes are conserved in both cell types.
Therefore, the feature specific to prokaryotic cells but not commonly found in eukaryotic cells is A) fimbriae.