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DNA replication - Wikipedia
WebDNA replication is an all-or-none process; once replication begins, it proceeds to completion. Once replication is complete, it does not occur again in the same cell cycle. This is made possible by the division of initiation of the pre-replication complex. Pre-replication complex
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Molecular mechanism of DNA replication (article) | Khan Academy
WebDNA replication, or the copying of a cell's DNA, is no simple task! There are about 3 billion base pairs of DNA in your genome, all of which must be accurately copied when any one of your trillions of cells divides 1 . The basic mechanisms of …
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9.2: DNA Replication - Biology LibreTexts
WebMar 17, 2022 · The replication of DNA occurs during the synthesis phase, or S phase, of the cell cycle, before the cell enters mitosis or meiosis. The elucidation of the structure of the double helix provided a hint as to how DNA is copied. Recall that adenine nucleotides pair with thymine nucleotides, and cytosine with guanine.
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DNA Replication - National Human Genome Research Institute
WebNov 30, 2023 · DNA replication is the process by which the genome’s DNA is copied in cells. Before a cell divides, it must first copy (or replicate) its entire genome so that each resulting daughter cell ends up with its own complete genome.
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DNA Replication Steps and Process - ThoughtCo
WebOct 7, 2019 · The process that copies DNA is called replication. Replication involves the production of identical helices of DNA from one double-stranded molecule of DNA. Enzymes are vital to DNA replication since they catalyze very important steps in the process.
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replication | Learn Science at Scitable - Nature
WebReplication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell. The replication process...
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DNA structure and replication review (article) | Khan Academy
WebA replication unit is any chunk of DNA that is capable of being replicated — e.g. a plasmid with an origin of replication (ORI) is a replication unit. Alternatively, this can also mean a region of DNA that is replicated together. An ORI is …
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14.3C: DNA Replication in Eukaryotes - Biology LibreTexts
WebOct 31, 2023 · DNA replication in eukaryotes occurs in three stages: initiation, elongation, and termination, which are aided by several enzymes. Learning Objectives. Describe how DNA is replicated in eukaryotes.
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What is DNA replication? – YourGenome
WebJul 21, 2021 · DNA replication is the process by which DNA makes a copy of itself during cell division. The first step in DNA replication is to ‘unzip’ the double helix structure of the DNA molecule. This is carried out by an enzyme called helicase which breaks the hydrogen bonds holding the complementary bases of DNA together (A with T, C with G).
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DNA Replication Mechanisms - Molecular Biology of the Cell
WebDuring DNA replication inside a cell, each of the two old DNA strands serves as a template for the formation of an entire new strand. Because each of the two daughters of a dividing cell inherits a new DNA double helix containing one old and one new strand ( Figure 5-5 ), the DNA double helix is said to be replicated “semiconservatively” by ...
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