circle

Supercoil

...verwinding or underwinding of the duplex makes the circle twist. Full article >>> Supercoil ed DNA Main article: Supercoil The B form of the DNA helix twists 360° per 10 bp in the absence of strain . But many molecular biological processes can induce strain . Full article >>...

Strain

... pesticide. Full article >>> Nicked circle (relaxed circle). During extr action of plasmid DNA from the bacteria l cell , one strand of the DNA becomes nicked. This relaxes the torsional strain needed to maintain supercoil ing, producing the familiar form of plasmid . (See Pla...

Satellite RNA

... are circular RNA s. They replicate by a rolling circle mechanism. The long multi-unit RNA s cleave in vitro without the addition of cleavage enzymes . Full article >>> Some viroidlike molecule s get into the cell as passengers inside a conventional plant virus . These are cal...

Rolling circle

They replicate by a rolling circle mechanism. The long multi-unit RNA s cleave i... circles. Full article >>> Rolling circle (sigma) replication A type of DNA replication where a replication fork moves around a circul...

Replicon

... horizon. Full article >>> Rolling circle amplification technology was developed through the independent efforts of the research groups of Paul Lizardi (Yale University), Eric Kool (University of Rochester), Jeffrey Auerbach ( Replicon , Inc.) and David Zhang (Mount Sinai ... Full articl...

Replication

...d to process tandem repeats produced by rolling circle RNA replication Facts RNA cleavage . Full article >>> Dr. Lawrence Brody, of the National Human Genome Research Institute's Genetic and Molecular Biology Branch, defines DNA replication . illustrated: View illustration ...

Prokaryotes

...the genetic material in virus es and cells . A circle of DNA in prokaryotes ; a DNA or an RNA molecule in virus es; ... Full article >>> -Smith which consists of the most ancient unicellular eukaryotes with a nucleus and rod shaped chromosome but no mitochondria or pl...

Plasmid

... Full article >>> plasmid A small circle of DNA that may be carried by a bacterium in addition to its genomic DNA . plasmodesma A cytoplasm ic strand that connects adjacent plant cells through pores in the cell wall . plasmodium Multinucleate ameboid mass, syncytial. Full articl...

Plasmalemma

...lasmalemma The cell membrane . plasmid A small circle of DNA that may be carried by a bacterium in addition to its genomic DNA . plasmodesma A cytoplasm ic strand that connects adjacent plant cells through pores in the cell wall . Full article >>> plasmalemma the cell membr...

Pericycle

pericycle circle of plant tissue of stems and roots between the cortex and stele Source: Noland, George B. 1983. General Biology , 11th Edition. St. Louis, MO. C. V. Mosby ... Full article >>> Pericycle - the outer boundary of the stele ....

Pathogenic

... are circular RNA s. They replicate by a rolling circle mechanism. The long multi-unit RNA s cleave in vitro without the addition of cleavage enzymes . Full article >>> A few are pathogenic . Two examples: Neisseria gonorrhoeae, the bacterium that causes gonorrhea. In the U.S., thi...

Pathogen

... are circular RNA s. They replicate by a rolling circle mechanism. The long multi-unit RNA s cleave in vitro without the addition of cleavage enzymes . Full article >>> A plant pathogen composed of molecule s of naked RNA only several hundred nucleotide s long . virulent Ca...

Mycelium

...e sent up once a year at the periphery producing a circle known since medieval times as a "fairy ring". Full article >>> Sexual ly compatible haploid hyphae fuse to produce a dikaryotic mycelium . This leads to the production of a basidiocarp. The most commonly-known basidiocarps are mush...

Genomic DNA

... Full article >>> plasmid A small circle of DNA that may be carried by a bacterium in addition to its genomic DNA . plasmodesma A cytoplasm ic strand that connects adjacent plant cells through pores in the cell wall . plasmodium Multinucleate ameboid mass, syncytial. Full articl...

Flagellum

...sists of nine triplet microtubules arranged in a circle with no central microtubule. base A substance that lowers the hydrogen ion concentration in a solution. Full article >>> Funicle: The portion of the flagellum of the antenna closest to the club. Full article >>> at o...

Eukaryotes

...9 doublets (pairs) of microtubules arranged in a circle around 2 central microtubules . This 9 + 2 pattern is character istic of all eukaryotic cilia and flagella but not those of prokaryotes . Full article >>> eukaryotes Any member of a group of organ isms that contains all plant s...

Eukaryote

...9 doublets (pairs) of microtubules arranged in a circle around 2 central microtubules . This 9 + 2 pattern is character istic of all eukaryotic cilia and flagella but not those of prokaryotes . Full article >>> Eukaryote . An organ ism whose cells possess a nucleus and other membra...

Dalton

... Denature . Full article >>> A core circle of scientific friends-Huxley, Charles Lyell, Joseph Dalton Hooker, and Asa Gray-actively pushed his work onto the fore of the scientific and public stage, and defended him against his many mounting critics. Full article >>> dalton s...

Cleavage

...d to process tandem repeats produced by rolling circle RNA replication Facts RNA cleavage . Full article >>> Sites of cleavage Rather than cutting DNA indiscriminately, a restiction enzyme cuts only double-helical segment s that contain a particular nucleotide sequence , ....

Cilium

...sists of nine triplet microtubules arranged in a circle with no central microtubule. base A substance that lowers the hydrogen ion concentration in a solution. Full article >>> dynein - a microtubule-dependent motor protein ; cytoplasm ic dynein s work in organelle trans port and ...

Cell membrane

...lasmalemma The cell membrane . plasmid A small circle of DNA that may be carried by a bacterium in addition to its genomic DNA . plasmodesma A cytoplasm ic strand that connects adjacent plant cells through pores in the cell wall . Full article >>> Passageways in the cell membr...

Band

...verwinding or underwinding of the duplex makes the circle twist. The conformation of a covalently closed-circular DNA molecule , which is coiled by torsional strain into the shape taken by a woundup elastic band . Full article >>> If there are any protein / molecule s that bind to t...