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Molecular mechanism of DNA replication (article) | Khan Academy
https://www.khanacademy.org/science/ap-biology/gene-expression-and-regulation/replication/a/molecular-mechanism-of-dna-replication
WEBKey points: DNA replication is semiconservative. Each strand in the double helix acts as a template for synthesis of a new, complementary strand. New DNA is made by enzymes called DNA polymerases, which require a template and a primer (starter) and synthesize DNA in the 5' to 3' direction.
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Chromosomes (article) | Cell cycle | Khan Academy
https://www.khanacademy.org/science/ap-biology/cell-communication-and-cell-cycle/cell-cycle/a/dna-and-chromosomes-article
WEBImage of a cell undergoing DNA replication (all the chromosomes in the nucleus are copied) and chromosome condensation (all the chromosomes become compact). In the first image, there are four decondensed, stringy chromosomes in the nucleus of the cell. After DNA replication, each chromosome now consists of two physically attached sister …
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Replication and Distribution of DNA during Mitosis
https://www.nature.com/scitable/topicpage/replication-and-distribution-of-dna-during-mitosis-6524841/
WEBThis process involves replication of the cell's chromosomes, segregation of the copied DNA, and splitting of the parent cell's cytoplasm. The outcome of binary fission...
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Chromosome Replication - an overview | ScienceDirect Topics
https://www.sciencedirect.com/topics/biochemistry-genetics-and-molecular-biology/chromosome-replication
WEBChromosome replication during S phase results in two identical sister chromatids that are bound together by protein complexes called cohesins. Sister chromatids are very long strands of DNA that must be compacted for division. This process, called chromosome condensation, occurs by specialized proteins called condensins that coil the DNA into ...
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9.2: DNA Replication - Biology LibreTexts
https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Concepts_in_Biology_(OpenStax)/09%3A_Molecular_Biology/9.02%3A_DNA_Replication
WEBMar 17, 2022 · There are multiple origins of replication on the eukaryotic chromosome, such that replication can occur simultaneously from several places in the genome. During elongation, an enzyme called DNA polymerase adds DNA nucleotides to the 3' …
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Chromosomes and genes (article) | Khan Academy
https://www.khanacademy.org/science/ms-biology/x0c5bb03129646fd6:inheritance-and-variation/x0c5bb03129646fd6:chromosomes/a/chromosomes-and-genes-ms
WEBDNA, or deoxyribonucleic acid, is formed through a process called DNA replication. DNA replication occurs during the cell division process known as the S phase of the cell cycle. Here are the key steps involved: 1. Initiation: The DNA double helix unwinds and separates into two strands.
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9.2 DNA Replication - Concepts of Biology | OpenStax
https://openstax.org/books/concepts-biology/pages/9-2-dna-replication
WEBThere are multiple origins of replication on the eukaryotic chromosome, such that replication can occur simultaneously from several places in the genome. During elongation, an enzyme called DNA polymerase adds DNA nucleotides to the 3' end of the template.
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The Initiation and Completion of DNA Replication in Chromosomes
https://www.ncbi.nlm.nih.gov/books/NBK26826/
WEBEucaryotic Chromosomes Contain Multiple Origins of Replication. We have seen how two replication forks begin at a single replication origin in bacteria and proceed in opposite directions, moving away from the origin until all of the DNA in the single circular chromosome is replicated.
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Conformation of sister chromatids in the replicated human genome
https://www.nature.com/articles/s41586-020-2744-4
WEBSep 23, 2020 · Chromosome conformation capture (Hi-C) 1, 2 analysis has revealed a complex genomic landscape of internal chromosomal structures in vertebrate cells 3, 4, 5, 6, 7, but the identical sequence of...
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11.2 DNA Replication - Microbiology | OpenStax
https://openstax.org/books/microbiology/pages/11-2-dna-replication
WEBIn one model, semiconservative replication, the two strands of the double helix separate during DNA replication, and each strand serves as a template from which the new complementary strand is copied; after replication, each double-stranded DNA includes one parental or “old” strand and one “new” strand.
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