prokaryote

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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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

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): procaryote
Farlex Partner Medical Dictionary © Farlex 2012

prokaryote

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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

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.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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 .
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
We have also recently purchased The Procaryotes, an on-line version of the book series; Marine Mammal Science, volumes 1 to 13 on CD-ROM; and Cambridge Scientific Abstracts Biological Sciences, an interdisciplinary database offering abstracts and citations to a wide range of research in biomedicine, biotechnology, zoology, ecology, and some aspects of agriculture and veterinary science.
The arrival of eucaryotes looks more progressive than it really was because of the failure to depict the persisting hordes of procaryotes. The same false impression is conveyed with each new arrival on the stage: vertebrates, large-brained animals, and so on.
Bacteria, together with cyanobacteria (blue-green algae), are single-celled lower protista known as procaryotes. Procaryotic cells do not have a true nucleus, the bacteria's DNA being present as a single molecule in the cell's interior.
coli) using traditional recombinant DNA techniques, because procaryotes lack the machinery necessary to synthesize biologically active proteins.[18] Tissue plasminogen activator (t-PA) is such a protein and is an important therapeutic agent for a variety of human clotting disorders.
The rRNA clock makes it clear, Pace says, that the eukaryotes, animals whose cells have nuclei -- have as ancient an origin as procaryotes, organisms whose cells have no nucleus (SN:5/3/86,p.280).
The species concepts for procaryotes. FEMS Microbiology Review, 2001; 25: 39-67.