* Nucleus: Prokaryotes lack a true nucleus. Their DNA is located in a region called the nucleoid, which is not enclosed by a membrane.
* Mitochondria: Prokaryotes do not have mitochondria, which are the powerhouses of eukaryotic cells. They generate energy through cellular respiration, but this occurs in the cell membrane.
* Endoplasmic reticulum (ER): Prokaryotes lack the ER, a network of membranes involved in protein synthesis and lipid metabolism in eukaryotes.
* Golgi apparatus: Prokaryotes do not have a Golgi apparatus, which is involved in packaging and modifying proteins in eukaryotic cells.
* Lysosomes: Prokaryotes lack lysosomes, which are organelles responsible for breaking down cellular waste in eukaryotic cells.
* Chloroplasts: Prokaryotes, with the exception of cyanobacteria, do not have chloroplasts, which are the sites of photosynthesis in eukaryotic cells.
* Centrioles: Prokaryotes lack centrioles, which are involved in cell division in eukaryotic cells.
In summary, prokaryotes lack all membrane-bound organelles found in eukaryotic cells. Their genetic material is located in the nucleoid, and they carry out energy production and other essential processes within the cell membrane and cytoplasm.
