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DNA replication
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Lesson # 14
Molecular Genetics
DNA Replication
◦ All DNA molecules need to be doubled o replicated in order for the cell to be able to make 2 nuclei out of one.
◦ Each nucleus must receive the same number of DNA molecules.
◦ Takes place during Interphase (Phase S)
At a molecular level
• Semiconservative replication.
• The two complimentary DNA strands separate.
• Free-floating nucleotides join to their complimentary bases through hydrogen bonds.
• Each strand serves as a template for the formation of a new complimentary strand.
• The new strand forms in direction n 5’ 3’
• As a result: 2 identical DNA molecules with an old strand and a newly formed strand.
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