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DNA replication - Wikipedia
The replication fork is a structure that forms within the long helical DNA during DNA replication. It is created by helicases, which break the hydrogen bonds holding the two DNA strands together in the helix. The resulting structure has two branching "prongs", each one made up of a single strand of DNA. These two strands serve as the template ...
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DNA Replication Fork: Definition & Overview - Study.com
Sep 21, 2021 · The replication fork is a very active area where DNA replication takes place. It is created when DNA helicase unwinds the double helix structure of the DNA. The replication fork looks like a fork ...
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DNA Replication- definition, enzymes, steps, mechanism, …
Aug 02, 2020 · The replication fork is the site of active DNA synthesis, where the DNA helix unwinds and single strands of the DNA replicates. Several sites of origin represent the replication forks. The replication fork is formed during DNA strand unwinding by the helicase enzyme which exposes the origin of replication. A short RNA primer is synthesized by ...
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DNA replication fork speed underlies cell fate changes and …
Mar 07, 2022 · To address whether slow replication dynamics is a feature of genuine totipotent cells, we measured replication fork speed in 2-cell-stage embryos in vivo (Fig. 1e).Notably, 2-cell-stage embryos ...
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DNA Replication Mechanisms - Molecular Biology of the Cell
Initially, the simplest mechanism of DNA replication seemed to be the continuous growth of both new strands, nucleotide by nucleotide, at the replication fork as it moves from one end of a DNA molecule to the other. But because of the antiparallel orientation of the two DNA strands in the DNA double helix (see Figure 5-2), this mechanism would require one daughter strand to …
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DNA Replication and Checkpoint Control in S Phase
Particularly important are two aspects of the replication fork: 1) the 5' to 3' polarity of the newly synthesized DNA and 2) the sequence of base pairs (color-coded in Figure 1). The DNA code in ...
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An In-depth Look at the 7 Major Steps of DNA Replication
As the replication fork progresses, new nucleotides are added in a continuous manner, thus generating the new strand. Lagging Strand Synthesis. On the opposite strand, DNA is synthesized in a discontinuous manner by generating a series small fragments of new DNA in the 5′ → 3′ direction. These fragments are called Okazaki fragments, which ...
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DNA Replication Quiz Questions And Answers - ProProfs
Mar 22, 2022 · Here's an interesting 'DNA replication quiz' that is designed to test your knowledge about the DNA replication process. Think you know everything about the term DNA replication? If you have studied molecular biology, you might have some idea or an even deeper knowledge of this process. It's a process of a single DNA molecule producing its two replicas. …
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DNA replication - California State University, Northridge
Replication at the chromosomal level ¥Replication is bidirectional. ¥For circular DNA (and linear chromosomes) Ðthe unwinding at the replication forks causes supercoiling . ¥DNA topoisomerases Ðenzymes that help relax the DNA by nicking the strands Ðreleasing the twists Ðthen rejoining the DNA ends. ÐExample is DNA gyrase
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Chapter 15 Biology: DNA Replication Flashcards | Quizlet
enzyme that untwists the double helix of DNA at the replication fork. Single-stranded binding protein. Bind to single strands of DNA preventing them from re-forming with each other. DNA polymerase III. Synthesizes the new strands, but it requires an existing 3' hydroxyl. Primase.
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