What common structure do prokaryotes and eukaryotes have?

What structure is found in both prokaryotes and eukaryotes and what is its function?

• Answer:

  there are a large variety of structures available in eukaryotes as they are more complex and advanced than prokaryotes. in prokaryotes, (bacteria) you will find nucleoid (region with naked DNA and with no histone proteins), mesosomes, free ribosomes (as golgi bodies are absent), cytoplasm, cell membrane and a few having cell wall. while in a typical eukaryotes you can find, well developed Nucleus surrounded by nuclear wall and inside to which is nucleoplasm, golgi bodies, endoplasmic reticulum, chloroplast (in plants), mitochondria, cell membrane, Cell wall (in plants only), ribosomes, vacuole(in plants), etc.