DNA Replication.

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Presentation transcript:

DNA Replication

DNA Replication DNA Replication is the process of making an exact copy of DNA This occurs inside the nucleus ONLY before the cell divides by mitosis, meiosis or binary fission

How do you make copies? Step 1: A helicase enzyme unzips the two strands by breaking the hydrogen bonds between bases Step 2: DNA polymerase enzymes add complimentary nucleotides to each of the original strands Step 3: DNA polymerase enzymes are released leaving you with two identical DNA molecules

Semiconservative Each of the new DNA molecules are exact copies of each other. In each molecule there is one original strand and one new strand

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