What is the similarity between a prokaryotic cell and a eukaryotic cell?

Answer 1

One similarity between prokaryotic and eukaryotic cells is that they both have a plasma membrane that separates the internal contents of the cell from the external environment. The plasma membrane regulates the passage of molecules in and out of the cell, and is made up of a phospholipid bilayer with embedded proteins. This similarity in having a plasma membrane is essential for both types of cells to maintain homeostasis and control their internal environment.