2. Eukaryotes and Prokaryotes


Prokaryote refers to any of the group of organisms primarily characterized by the lack of true nucleus and other membrane-bound cell compartments: such as mitochondria and chloroplasts, and by the possession of a single loop of stable chromosomal DNA in the nucleoid region and cytoplasmic structures, such as plasma membrane, vacuoles, primitive cytoskeleton, and ribosomes. Examples of prokaryotes are bacteria and archaea.

Prokaryote Definition

prokaryote cell diagram

Schematic diagram of a prokaryotic cell.

A prokaryote is defined as any organism that is chiefly characterized by a cell devoid of a well-defined nucleus as opposed to a eukaryote that has a nucleus. Instead of a nucleus, the prokaryotes have a nucleoid region where the genetic materials are located.

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