1. Bell Work What are the base pairs?
What structures make up a nucleotide?
Why do we need to replicate our DNA?

2. DNA Replication

3. DNA Replication When DNA makes an exact copy of itself.
Required step before cell division (making new cells).
DNA is the template / Enzymes do the work.
Follows rules of base pairing (Chargaff’s Rules)
Each body cell gets a complete set of identical DNA

4. Semi-conservative: Each new strand of DNA is ½ old (original) DNA and ½ new DNA.

6. DNA Polymerase Helicase
Enzyme that joins individual nucleotides to produce a DNA molecule.
Nucleotide
Helicase
Enzyme that unzips the DNA by breaking the hydrogen bonds between the base pairs.
Nucleotide

7. Helicase unzips the two strands DNA Polymerase adds nucleotides

8. CC - DNA Structure & Replication