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also pro·car·y·ote  (prō-kăr′ē-ōt′)
Any of various microorganisms of the domains Archaea and Bacteria, characterized by the absence of a distinct membrane-bound nucleus and membrane-bound organelles and by the simultaneous occurrence of DNA transcription and protein synthesis at the same site, in contrast to eukaryotes. Also called moneran.

[French procaryote : Greek pro-, before; see pro-2 + Greek karuōtos, having nuts (from karuon, nut; see karyo-).]

pro·kar′y·ot′ic (-ŏt′ĭk) adj.


(prəʊˈkærɪɒt) ,




(Biology) any organism having cells in each of which the genetic material is in a single DNA chain, not enclosed in a nucleus. Bacteria and archaeans are prokaryotes. Compare eukaryote
[from pro-2 + karyo- + -ote as in zygote]
prokaryotic, procaryotic adj


or pro•car•y•ote

(proʊˈkær iˌoʊt, -i ət)

any one-celled organism that lacks a distinct membrane-bound nucleus and has its genetic material in the form of a continuous strand forming loops or coils: characteristic of monerans. Compare eukaryote.
[taken as singular of New Latin Prokaryota, earlier Procaryotes (1925); see pro-2, eukaryote]
pro•kar`y•ot′ic (-ˈɒt ɪk) adj.


Any of a wide variety of one-celled organisms that lack a distinct cell nucleus or other structures bound by a membrane and that have DNA that is not organized into chromosomes. Prokaryotes reproduce asexually, are the most primitive and ancient known forms of life, and include the bacteria and blue-green algae. Prokaryotes are grouped as a separate kingdom in taxonomy. Also called moneran. Compare eukaryote. See Table at taxonomy.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.prokaryote - a unicellular organism having cells lacking membrane-bound nuclei; bacteria are the prime example but also included are blue-green algae and actinomycetes and mycoplasma
organism, being - a living thing that has (or can develop) the ability to act or function independently
eucaryote, eukaryote - an organism with cells characteristic of all life forms except primitive microorganisms such as bacteria; i.e. an organism with `good' or membrane-bound nuclei in its cells
References in periodicals archive ?
The first standard asks high schoolers to compare and contrast eukaryotic and prokaryotic cells to "evaluate .
In addition, chemically modified sgRNA may aid in editing challenging targets even in common cell lines, and can provide protection against exonucleases in prokaryotic cells.
Specifically, the evidence shows that the invention of such systems in eukaryotic cells [such as those in mammals] would not have been obvious over the invention of CRISPR-Cas9 systems in any environment, including in prokaryotic cells [single-cell organisms like bacteria] on in vitro, because one of ordinary skill in the art would not have reasonably expected a CRISPR-Cas9 system to be successful in a eukaryotic environment," the judgment said.
Living organisms have been found in sediment samples from 860 to 1626 meters below the seabed, including intact prokaryotic cells, which are micro-organisms that lack nuclei.
Objective: The emergence of complex eukaryotic life forms on Earth from prokaryotic cells is one of the most fundamental questions in biology and also one of the least understood transitions in evolution.
Indeed, we cannot ignore the issues regarding the use of cytokines secreted by prokaryotic cells or those artificially synthesized; regardless of whether they function in vitro or in vivo , all of these oligopeptides may hydrolyze under the influence of proteases and peptidases.
The prokaryotic cells of the human microbiome outnumber the human eukaryotic host cells by about 100 to 1, and microbial collective genes outnumber the host genes by about 150 to 1 (8, 9).
Ubiquinone, also known as CoQ, is an isoprenoid component and lipid-soluble molecule which plays various roles in both eukaryotic and prokaryotic cells.
Prokaryotic cells are defined by not having internal organelles (nuclei or mitochondria, among others) and by relying on anaerobic forms of metabolism.