Microorganisms exist as either prokaryotes or eukaryotes. The prokaryotic cells are morphologically much simpler than eukaryotic cells. The prokaryotic cells lack internal membrane bound organelles that are present in the cytoplasm of eukaryotic cells such as mitochondria and chloroplast etc. Though simple, prokaryotic cell contains a variety of structures, however, all the structures are not found in every prokaryotic organism, A prokaryotic cell is bounded by a chemically complex cell wall. A cell membrane lies below the cell wall and surrounds the inner cytoplasmic matrix. This cytoplasmic matrix include unbounded nucleoid, ribosomes and some inclusion bodies. External to the cell wall there occurs extra components possessing different functions. The most typical example for prokaryotic cell organization is the bacterial cell. Structurally a bacterial cell consists of Structures external to the cell wall, cell wall and structures internal to the cell wall.


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