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prokaryoteenUK
pro·kar·y·ote also pro·car·y·ote P0575900 (prō-kăr′ē-ōt′)n. 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.prokaryote (prəʊˈkærɪɒt) , prokaryot or procaryoten (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 adjpro•kar•y•ote or pro•car•y•ote (proʊˈkær iˌoʊt, -i ət)
n. 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. pro·kar·y·ote (prō-kăr′ē-ōt′) 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.Thesaurus| Noun | 1. | 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 mycoplasmaprocaryoteorganism, being - a living thing that has (or can develop) the ability to act or function independentlyeucaryote, 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 |
Translations
prokaryoteenUK
prokaryote: see MoneraMonera,
taxonomic kingdom that comprises the prokaryotes (bacteria and cyanobacteria). Prokaryotes are single-celled organisms that lack a membrane-bound nucleus and usually lack membrane-bound organelles (mitochondria, chloroplasts; see cell, in biology).
..... Click the link for more information. .Prokaryote an organism that does not have a typical cell nucleus and chromosomal apparatus. Prokaryotes include bacteria, blue-green algae, rickettsiae, and mycoplasms. In the organic world, according to the latest classification system, prokaryotes are classified as a kingdom (Prokariota) or a superkingdom that is comparable to the kingdom or super-kingdom of eukaryotes. In prokaryotes, the physical substrate associated with the transmission and realization of hereditary information consists of a strand of deoxyribonucleic acid (DNA). The DNA usually has a ringlike shape and is localized more or less in the central part of the organism, which is called the nucleoid; the nucleoid is not separated by a membrane from the cytoplasm. Unlike the DNA in eukaryotes, the DNA in prokaryotes is usually not bound to histones (it does not form nucleohistone) and the functioning of genes is regulated through metabolites. Also, prokaryotes do not have mitochondria and complexly organized flagella. Prokaryotes play a very important role in the cycle of matter in the biosphere. Blue-green algae were probably the first autotrophic organisms to appear on earth in the course of the evolution of life. REFERENCEPeshkov, M. A. Tsitologiia bakterii. Moscow-Leningrad, 1955.IU. I. POLIANSKII prokaryote[prō′kar·ē‚ōt] (cell and molecular biology) A primitive nucleus, where the deoxyribonucleic acid-containing region lacks a limiting membrane. Any cell containing such a nucleus, such as the bacteria and the blue-green algae. prokaryoteenUK
prokaryote [pro-kar´e-ōt] any member of the kingdom Monera; a unicellular organism lacking a true nucleus and nuclear membrane, having genetic material composed of a single loop of naked double-stranded DNA. The microorganisms, comprising the bacteria and blue-green bacteria (formerly blue-green algae), are predominantly unicellular but may have filamentous, mycelial, or colonial forms. Prokaryotes, with the exception of genus Mycoplasma, have a rigid cell wall. adj., adj prokaryot´ic.pro·kar·y·ote (prō-kar'ē-ōt), A member of the superkingdom Prokaryotae; an organismic unit consisting of a single and presumably primitive moneran cell, or a precellular organism, which lacks a nuclear membrane, paired organized chromosomes, a mitotic mechanism for cell division, microtubules, and mitochondria.
See also: Prokaryotae, Monera, eukaryote. Synonym(s): procaryoteprokaryote also procaryote (prō-kăr′ē-ōt′)n. 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.
pro·kar′y·ot′ic (-ŏt′ĭk) adj.pro·kar·y·ote (prō-kar'ē-ōt) A member of the superkingdom Prokaryotae; an organism consisting of a single cell, or a precellular organism, which lacks a nuclear membrane, paired organized chromosomes, a mitotic mechanism for cell division, microtubules, and mitochondria.
See also: eukaryote
Synonym(s): procaryote. prokaryote or prokaryote any organism, including those in the domains BACTERIA or ARCHAEA, that lacks a membrane-bound nucleus and has no MITOSIS or MEIOSIS. Organelles such as the MITOCHONDRION and the ENDOPLASMIC RETICULUM are also lacking. Compare EUKARYOTE and See Fig. 155 .prokaryoteenUK
Synonyms for prokaryotenoun a unicellular organism having cells lacking membrane-bound nucleiSynonymsRelated WordsAntonyms |