ISPE Glossary of Pharmaceutical and Biotechnology Terminology

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Prokaryote

A unicellular organism having a less complex structure than a eukaryote. It is characterized by the absence of a nucleus and by having the genetic material in the form of simple filaments of DNA. The sizes of most prokaryotes vary from 0.5µm to 3µm in equivalent radius. Different species have different shapes such as spherical or Coccus (for example, Staphylococci), cylindrical or bacillus (E. coli), or spiral or spirillum (Rhodospirillum).

See also: Eukaryote

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