DNA Replication Factory and Protein


Duration: 1:43

Views: 321


Description: DNA (deoxyribose nucleic acid) carries all the genetic information needed to re-create itself and to pass on the characteristics of the organism. The “factory” model of DNA replication hypothesizes a specific nuclear structure in which the molecular machinery for replication forks are brought together. Scientists had known for a very long time that organisms make copies of their DNA. Making extra copies of the instructions in DNA allows an organism to grow and reproduce. The scientific word for 'copy' is 'replication.' So when we talk about DNA making copies of itself, we call it DNA replication. DNA replication is a semiconservative process in which each parental strand serves as a template for the synthesis of a new complementary daughter strand. 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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