Prokaryote

Prokaryotes (from Old Greek pro- before + karyon nut or kernel, referring to the cell nucleus, + suffix -otos, pl. -otes; also spelled "procaryotes") are organisms without a cell nucleus (= karyon), or indeed any other membrane-bound organelles, ...
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Prokaryotes are unicellular (in rare cases, multicellular) organisms without a nucleus. The name prokaryote comes from the Greek pros meaning before and karyon meaning nut, referring to the nucleus.
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Prokaryotes
Much of our understanding of gene control comes from studies of prokaryotes.
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Prokaryotes are much simpler in their organization than are eukaryotes. There are a great many more organelles in eukaryotes, also more chromosomes. The usual method of prokaryote cell division is binary fission.
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Prokaryotes include the kingdoms of Monera (simple bacteria) and Archaea.
They are characterized by:
the lack of a nucleus;
the possession of a single double-stranded DNA molucule
the possession of a very small range of organelles ...
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prokaryotes: cells that do not contain a nucleus or internal organelles; include bacteria, cyanobacteria, and archaebacteria.
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Prokaryote. A bacterial cell lacking a true nucleus; its DNA is usually in one long strand. See Eukaryote.
Proto-oncogene. See oncogene.
Primary cell. A cell or cell line taken directly from a living organism, which is not immortalized.
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prokaryote Organism in which the chromosomes are not contained within membrane-bound nuclei.
prokaryotic cell A type of cell lacking a nucleus and membrane-bound organelles; found in the Kingdom Monera.
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prokaryotes
an organism that is either a bacterium or a blue-green alga, its main characteristic being prokaryotic cells lacking a membrane-bound nucleus and no mitosis or meiosis.
Covered in Lab 3 Cells and Cell Biology ...
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Prokaryote: A single-celled organism with a simple internal structure and no nucleus. Bacteria and archaebacteria are prokaryotes.
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In prokaryotes, a cell that has been ge-netically altered through the uptake of foreign DNA. In higher eukaryotes, a cultured cell that has acquired a malignant phenotype.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
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In prokaryotes (bacteria and other simple organisms) as well as the more complex eukaryotes, ribosomes help translate gene-encoded information into a specific protein. Ribosomes consist of two unequally sized subunits containing RNA and proteins.
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Prokaryote simple one-celled organisms that do not have their DNA enclosed in a true nucleus and lack many other organelles such as mitochondria and chloroplasts
(pro = before in front of; karyon = nut kernel nucleus) ...
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: A prokaryote kingdom that has not diverged much from the ancestral prokaryote stock. Contemporary species of
Archeabacteria
live in extreme conditions. The three major groups are
halobacteria
,
sulphobacteria
and
methanogens
.
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Some prokaryotes are essential to the nitrogen cycle because of their role in nitrogen fixation, the conversion of nitrogen gas to ammonium ions. These ions can then be used to build amino acids.
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See Prokaryote. Evolution. The long-term process through which a population of organisms accumulats genetic changes that enable its members to successfully adapt to environmental conditions and to better exploit food resources. Exon.
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[A plasmalogen] plasmid An extrachromosomal, independently replicating, small circular DNA molecule of prokaryotes associated with antibiotic resistance; commonly employed in genetic engineering.
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This concludes what I'm going to discuss about prokaryotes. Several conclusions seem to emerge from these studies. First, given exponential growth and large population sizes, lots of mutations seem to occur in bacterial populations.
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The cytoplasmic membrane of prokaryotes is fundamentally similar to that of a eukaryotic cell. The variety of proteins in the cytoplasmic membrane in prokaryotes is greater because of the significantly greater number of functions performed by it.
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The three-domain system is a biological classification introduced by Carl Woese in 1990 that emphasizes his separation of prokaryotes into two groups, originally called Eubacteria and Archaebacteria.
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Hair-like structure attached to a cell, used for locomotion in many protists and prokaryotes.
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Although prokaryotes share some common features because of the lack of membrane bound organelles (e.g., coupled transcription and translation are possible in prokaryotes but not in eukaryotes), ...
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In prokaryotes the transfer is a one-way process. The union of two bacterial cells, during which chromosomal material is transferred from the donor to the recipient cell.
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The type of cell division by which prokaryotes reproduce; each dividing daughter cell receives a copy of the single parental chromosome.
binomial
[L. bi, twice, two + Gk. nomos, usage, law] ...
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The entire complement of genetic material in a chromosome set. The entire genetic complement of a prokaryote, virus, mitochondrion or chloroplast or the haploid nuclear genetic complement of a eukaryotic species.
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Prokaryotes - primitive cell type that lacks a nuclear membrane and membrane-bound organelles
Protein - a complex molecule found in numerous cellular structures that is composed of amino acids ...
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ProkaryoteGeneral term used for organisms that are not eukaryotes. Includes two evolutionary-distinct groups: bacteria and archaeans. Sometimes spelled procaryote.
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