Biology Chapter 11

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  • Created by: Jon_Higgs
  • Created on: 27-03-14 18:14
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  • Replication of DNA
    • Cell division occurs in two main stages
      • Nuclear division
        • The process by which the nucleus and Genetic information is divides
      • Cell division
        • Follows nuclear division and where the whole cell divides
    • Before Any division can take place the DNA
      • This ensures that all the daughter cells will inherit the genetic information to produce enzymes  est.
    • Cell division is usually a very precise process
    • Semi conservative replication
      • 1.) The enzyme helicase breaks down the hydrogen bonds
        • Hydrogen bonds are weak so allow rapid break down of hydrogen bonds to occur
      • Double helix seperates into two strands
        • Exposed polynucleotides act as a template to which complementary nucleotides are formed
      • Separate free nucleotides broken from the polynucleotide are reattached through the enzyme DNA Polyemerase
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