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Eukaryotes initiate DNA replication at multiple points in the chromosome, so replication forks meet and terminate at many points in the chromosome. Because eukaryotes have linear chromosomes, DNA replication is unable to reach the very end of the chromosomes. Due to this problem, DNA is lost in each replication cycle from the end of the chromosome.
The process of semiconservative replication for the site of DNA replication is a fork-like DNA structure, the replication fork, where the DNA helix is open, or unwound, exposing unpaired DNA nucleotides for recognition and base pairing for the incorporation of free nucleotides into double-stranded DNA.
Each D-loop contains an origin of replication for the heavy strand. Full circular DNA replication is initiated at that origin and replicates in only one direction. The middle strand in the D-loop can be removed and a new one will be synthesized that is not terminated until the heavy strand is fully replicated, or the middle strand can serve as a primer for the heavy strand replication.
Rolling circle replication (RCR) is a process of unidirectional nucleic acid replication that can rapidly synthesize multiple copies of circular molecules of DNA or RNA, such as plasmids, the genomes of bacteriophages, and the circular RNA genome of viroids. Some eukaryotic viruses also replicate their DNA or RNA via the rolling circle mechanism.
The process that copies DNA is called DNA replication. [8] It is through a similar process that a child inherits genes from its parents when a copy from the mother is mixed with a copy from the father. DNA can be copied very easily and accurately because each piece of DNA can direct the assembly of a new copy of its information.
Prokaryotic DNA Replication is the process by which a prokaryote duplicates its DNA into another copy that is passed on to daughter cells. [1] Although it is often studied in the model organism E. coli, other bacteria show many similarities. [2] Replication is bi-directional and originates at a single origin of replication (OriC). [3]
Curiously, G 2 phase is not a necessary part of the cell cycle, as some cell types (particularly young Xenopus embryos [1] and some cancers [2]) proceed directly from DNA replication to mitosis. Though much is known about the genetic network which regulates G2 phase and subsequent entry into mitosis, there is still much to be discovered ...
The process of DNA replication is a fundamental process used by all living organisms as it is the basis for biological inheritance. Reason same reasons given in Cell membrane (diagrammatic) Articles this image appears in DNA replication, DNA, Replication fork Creator Mariana Ruiz. Support as nominator--Alokprasad84 08:17, 12 June 2008 (UTC)