Structures of Prokayotic cells:
Cell wall: it is strong an rigid. The cell wall prevents the cell from bursting when it absorves water by osmosis. The cell wall is made out of Nurenin, a molecule that consists of a parallel polysaccharide chain cross-linked at regular intervals by short chain of aminoacis.
Plasma membrane: it is made out of phospholipids. It controls the exchange of waste materials and nutrients. It is fully permeable. The membrane can also be used as a receptor of hormonmes and neurotransmiters and other chemicals.
Mesosomes: they are infoldings of the surface cell divisions. They organise the separation of two daughter cell and help in the formation also of cross wall between doughter cell.
Ribosomes: They are tiny organelles ( 70s ). They are found in large number in the cytoplasm. Each ribosome consists of 2 subunit. Ribosmes are made up of equall amounts of RNA and proteins. The RNA is made in the nucleus. They are the sites of protein synthesis.
Naked DNA: Unit of unheritance ( genetic material ) organised usually into genes andchromosomes but lies freely in the cytoplasm of prokaryotic cells.