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Topic: Semiconservative replication

	DNA replication (Site not responding. Last check: 2007-10-14)
		DNA replication or DNA synthesis refers to the process of copying a double-stranded DNA strand, prior to cell division (in eukaryotes, during the S phase (see also mitosis and meiosis)).
		This origin of replication is unwound, and the partially unwound strands form a "replication bubble", with one replication fork on either end.
		At the beginning of replication, an enzyme called DNA polymerase binds to the RNA primase, which indicates the starting point for the replication.
	www.wapipedia.org /wikipedia/mobiletopic.aspx?cur_title=DNA_replication (637 words)

	Replication - Wikipedia, the free encyclopedia
		In finance option replication is the trading strategy used to ensure at a certain date the payoff of an option without trading this option.
		Replication (computer science), the use of redundant resources to improve reliability, fault-tolerance, or performance.
		Replications should not be confused with repeated measurements which refer literally taking several measurements of a single occurrence of a phenomenon.
	en.wikipedia.org /wiki/Replication (212 words)

	Possible Models for DNA Replication
		Three ways for DNA molecules to replicate may be considered, each obeying the rules of complementary base pairing.
		Semiconservative replication would produce molecules with both old and new DNA, but each molecule would be composed of one old strand and one new one.
		Each strand acts as a template for the synthesis of a new DNA molecule by the sequential addition of complementary base pairs, thereby generating a new DNA strand that is the complementary sequence to the parental DNA.
	www.accessexcellence.org /AB/GG/possible.html (180 words)

	DNA Replication (Site not responding. Last check: 2007-10-14)
		The replication of DNA is built upon the existence of sequence complementarity.
		In semiconservative DNA replication the original double helix is broken apart, one DNA molecule finding its way into one daughter double helix and the other, complementary, molecule finding its way into the other daughter double helix.
		Fragments of DNA result from this discontinuous method of DNA replication (i.e., synthesis occurs towards the existing daughter DNA and upon the inevitable collision with this strand the DNA polymerase is neither able to continue polymerizing nor stitch together the two adjacent DNA molecules).
	www.mansfield.ohio-state.edu /~sabedon/biol1060.htm (1409 words)

	Botany online: Molecular Genetics - Replication (Site not responding. Last check: 2007-10-14)
		Semiconservative replication was proven to exist in higher plants with Nicotiana tabacum.
		While the replication of one of the two strands can be easily explained at least in a strictly formal sense, is that of the respective complementary strand much more complicated.
		Proof has accumulated that such selective replications are necessary for cell differentiation, the function of the cell and morphogenesis (organ and tissue formation).
	www.biologie.uni-hamburg.de /b-online/e21/21e.htm (776 words)

	DNA Structure, Replication and Eukaryotic Chromatin Structure>
		DNA replication is semi-conservative, one strand serves as the template for the second strand.
		To prepare DNA for replication, a series of proteins aid in the unwinding and separation of the double-stranded DNA molecule.
		The DNA molecule is unwound and prepared for synthesis by the action of DNA gyrase, DNA helicase and the single-stranded DNA binding proteins.
	www.ndsu.nodak.edu /instruct/mcclean/plsc431/eukarychrom/eukaryo2.htm (727 words)

	Semiconservative replication - Wikipedia, the free encyclopedia
		Semiconservative replication describes the method by which DNA is replicated in all known cells.
		Semiconservative replication would produce two copies that each contained one of the original strands and one entirely new strand.
		That the semiconservative model was correct was verified by the Meselson-Stahl experiment and other even more revealing experiments that allowed for autoradiographic visualization of the distribution of old and new strands within replicated chromosomes.
	en.wikipedia.org /wiki/Semiconservative_replication (257 words)

	Steve's place - DNA Replication
		Replication of DNA is semiconservative: each daughter helix contains one strand of the parental helix.
		Recently replicated DNA is only methylated on the parental strand, and this hemimethylated DNA is resistant to initiation because it won't bind initiator proteins.
		Replication bubbles are initiated by this multifunctional protein by its binding to AT-rich sequences in the ori.
	www.steve.gb.com /science/dna_replication.html (2668 words)

	DNA Replication
		Meselson and Stahl (1958) used heavy nitrogen (15N) to demonstrate that replication is semiconservative.
		This flash animation at "DNA from the Beginning" describes this experiment and some of Lederbergs experiments with DNA polymerase: A half DNA ladder is a template for copying the whole.
		Use of two labels demonstrated that replication was bidirectional in prokaryotes and eukaryotes (the later label showed up on both sides of the initial label, showing that new DNA was being made in two places, on either side of the starting point)
	www.csuchico.edu /~jbell/Biol207/replication.html (335 words)

	DNA Replication
		They disproved the conservative model of replication after observing and analyzing a single round of replication, but a second round of replication was necessary to disprove the dispersive model of DNA replication.
		Although Meselson and Stahl showed that DNA replication was semiconservative, their results did not provide any information on chromosome replication -- questions such as the number of places that replication started (origins) and the direction of replication remained to be answered.
		In fact, he showed that lagging strand replication proceeded through the synthesis of relatively short polynucleotide segments that were then joined (ligated) together to form a continuous strand.
	www.mun.ca /biochem/courses/3107/Lectures/Topics/DNA_replication.html (1089 words)

	DNA Replication
		The nature of base pairing meant that if the two strands of a DNA molecule were separated, they could each serve as a template for the creation of a complementary strand by bringing in individual nucleotides to base pair with their complementary base on the template, and joining the new nucleotides together.
		Conservative replication proposed that after replication, one DNA molecule consists entirely of newly synthesized DNA whereas the other molecule is entirely original DNA.
		If semiconservative replication occurred, then each DNA molecule after replication would contain heavy nitrogen and light nitrogen, and would therefore have a density intermediate between the two.
	www.emunix.emich.edu /~rwinning/genetics/replic.htm (663 words)

	[No title]
		In addition, a rather awkward mechanism is employed by the replication machinery to accommodate the inability of polymerase to extend a 5' end of a DNA molecule.
		In a semiconservative mechanism, the parental strands would come apart like a zipper being unzipped as the base-pairing interactions were broken.
		Schematic diagram of leading-strand and lagging strand DNA synthesis at a replication fork.
	web.uconn.edu /mcb201/lecture08.html (1167 words)

	Cyclin B-Cdk1 Kinase Stimulates ORC- and Cdc6-Independent Steps of Semiconservative Plasmid Replication in Yeast ... (Site not responding. Last check: 2007-10-14)
		replication in vitro at the restrictive temperature (53).
		Replicated DNA was extracted and filtered with Sephadex G-50, and recovery was checked by analyzing 25% of the reaction on an ethidium bromide-stained gel.
		Following replication, the DNA was purified, recovery was quantified, and 75% of the reaction was separated on a CsCl density gradient.
	mcb.asm.org.cob-web.org:8888 /cgi/content/full/19/2/1226 (9969 words)

	The Meselson - Stahl Experiment (Site not responding. Last check: 2007-10-14)
		This mode of replication is described as semiconservative: one-half of each new molecule of DNA is old; one-half new.
		As this interpretative figure indicates, their results show that DNA molecules are not degraded and reformed from free nucleotides between cell divisions, but instead, each original strand remains intact as it builds a complementary strand from the nucleotides available to it.
		This is called semiconservative replication because each daughter DNA molecule is one-half "old" and one-half "new".
	home.comcast.net /~john.kimball1/BiologyPages/M/Meselson_Stahl.html (484 words)

	The Basics: Replication
		Replication begins on the bacterial chromosome at a specific sequence of nucleotides called the origin.
		This newly replicated strand is called the lagging strand because it is discontinuously synthesized away from the replication fork.
		The processes of bidirectional replication and the concept of multiple replication forks are discussed in more detail in the replication laboratory.
	plato.acadiau.ca /courses/biol/Microbiology/Replication.htm (878 words)

	DNA replication - Gurupedia
		DNA replication or DNA synthesis is the process of copying a double-stranded DNA strand, prior to cell division (in eukaryotes, during the S phase (see also mitosis and
		A primase, which generates an RNA primer to be used in DNA replication.
		A DNA holoenzyme, which is actually a complex of enzymes that performs the actual replication.
	www.gurupedia.com /d/dn/dna_replication.htm (582 words)

	Database Replication in MySQL
		Replication allows you to take one database, make an exact copy of it on another server, and set one of them (the slave) to take all its updates from the other (the master).
		Since a replicating database simply repeats statements, the databases are not necessarily exactly in sync, and advanced users can take advantage of this.
		Replication is not a guarantee that the slave will be in sync with the master at any one point in time.
	www.databasejournal.com /features/mysql/article.php/3355201 (879 words)

	DNA replication, Mitosis, and Meiosis
		DNA replication is a precursor to asexual and sexual cell division.
		Illustration of semi-conservative replication; illustration of alternative models of replication; illustration of a replication fork.
		Within each chromatid, one strand of the DNA helix is the "original" strand, the other is the newly synthesized strand created via semiconservative replication during the S phase.
	cropandsoil.oregonstate.edu /classes/css430/notes4s.htm (1018 words)

	DNA REPLICATION AND REPAIR DNA replication is semiconservative Conservative and semiconservative mechanisms of ... (Site not responding. Last check: 2007-10-14)
		DNA REPLICATION AND REPAIR DNA replication is semiconservative Conservative and semiconservative mechanisms of DNA replication differ
		Conservative and semiconservative mechanisms of DNA replication differ in whether the newly synthesized strands pair with each other (conservative) or with an old strand (semiconservative).
		The first definitive evidence for semiconservative replication came from a classic experiment by Meselson and Stahl Information on their experiment can be visualized by looking at "Classic Experiment 12.1 on the CD-ROM that came with your text.
	natsci.edgewood.edu /Biology402/dna_replication_and_repair_lecture.htm (234 words)

	Replication of DNA (via CobWeb/3.1 planet03.csc.ncsu.edu) (Site not responding. Last check: 2007-10-14)
		DNA replication begins with a partial unwinding of the double helix at an area known as the replication fork.
		The result of this side's discontiguous replication is the production of a series of short sections of new DNA called Okazaki fragments (after their discoverer, a Japanese researcher).
		To replicate such huge molecules as human DNA at this speed requires not one, but many replication forks, forming replication bubbles and producing many segments of DNA strands that eventually meet up together and are joined to form the newly synthesized double helix.
	www.ncc.gmu.edu.cob-web.org:8888 /dna/replicat.htm (909 words)

	[No title] (Site not responding. Last check: 2007-10-14)
		Results show that after one generation, the double stranded DNA is 1/2 heavy (from the parent) and 1/2 light (newly synthesized).
		The parent strand at the 3' end of the template determines the daughter or leading strand in continuous replication.
		The parent strand at the 5' end of the template produces the lagging strand as short pieces of DNA (100-200 nucleotides in eukaryotes and longer in prokaryotes).
	www.blc.arizona.edu /INTERACTIVE/DNA3/Replication.html (284 words)

	MySQL AB :: MySQL 5.0 Reference Manual :: 6 Replication
		It introduces replication concepts, shows how to set up replication servers, and serves as a reference to the available replication options.
		Im testing replication structured master to cascade of slave servers but i got sync problem if a client use a slave to insert/update data.
		If you are using InnoDB tables, remember that nothing is replicated until the transaction is completed, so if you need to read information to complete the transaction that is dependent upon what has been written eg the value of an auto_increment field, you need to read it from the master.
	dev.mysql.com /doc/refman/5.0/en/replication.html (1097 words)

	Perspective: Density matters: The semiconservative replication of DNA -- Hanawalt 101 (52): 17889 -- Proceedings of the ...
		Perspective: Density matters: The semiconservative replication of DNA -- Hanawalt 101 (52): 17889 -- Proceedings of the National Academy of Sciences
		of the duplex DNA rotating at a replication fork.
		Distinguishing semiconservative replication from nonconservative repair replication by using density labeling with 5BU.
	www.pnas.org /cgi/content/full/101/52/17889 (3809 words)

	LECTURE OUTLINES
		This model, which was shown to be incorrect, predicted that after replication, the parent double-stranded DNA would remain intact while the daughter double-stranded DNA would be entirely newly synthesized
		A replication fork is the area of DNA that is being unwound prior to replication
		At the replication fork, one strand is synthesized continuously, the other discontinuously, because the strands are antiparallel
	www.tusculum.edu /faculty/home/ivanlare/html/notes/12replication.html (603 words)

	DNA Replication (Site not responding. Last check: 2007-10-14)
		This is semiconservative replication, because each new strand is half comprised of molecules from the old strand.
		The actual results were as expected for the semiconservative model and thus Watson and Crick's suspicion was borne out.
		We will approach the study of the moelcular mechanism of DNA replication from the point of view of the machinery that is required to accomplish it.
	web.mit.edu /esgbio/www/dogma/repl.html (924 words)

	Introduction to Genetics and Semiconservative Replication (via CobWeb/3.1 planet03.csc.ncsu.edu) (Site not responding. Last check: 2007-10-14)
		The difference between one organism and another organism, at its most basic level, is a difference between the biochemical reactions that the two different organisms can perform.
		The process by which the DNA sequence is faithfully duplicated is known as semiconservative replication.
		Replication begins with the association of specific proteins known as helicases that cause the DNA helix to unwind.
	www.ivytech.net.cob-web.org:8888 /twmurphy/text_pg/replicat.htm (850 words)

	Concepts DNA replication and recombination DNA is reproduced by semiconservative replication DNA ...
		Concepts DNA replication and recombination DNA is reproduced by semiconservative replication DNA synthesis in bacteria involves
		Replication is controlled by a variety of genes
		Replication proceeds as before, with DNA synthesized 5’ to
	anirvan_c.tripod.com /chapter/chapter17.htm (296 words)

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