Nucleoid

In prokaryotes, the nucleoid (meaning nucleus-like and also known as the nuclear region, nuclear body or chromatin body) is an irregularly shaped region within the cell where the genetic material is localized. The nucleic acid is a circular, double-stranded piece of DNA and multiple copies may exist. This method of genetic storage can be contrasted against that of the eukaryotes, where DNA is packed into chromatins and sequestered within a membrane-bound organelle called the nucleus. The nucleoid can be clearly visualised on an electron micrograph at high magnification, where although its appearance may differ, it is clearly visible against the cytosol. Sometimes even strands of what is thought to be DNA are visible. By staining with the Feulgen stain, which specifically stains DNA, the nucleoid can also be seen under a light microscope.
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The loosely tangled clump of DNA within the cytoplasm of a prokaryotic cell.