1. DNA & Replication

2. DNA
Deoxyribonucleic Acid
Instructions for life =
Proteins!!

3. DNA Structure Double Helix Sides = sugar & phosphate Rungs (middle) =
base pairs

4. Nucleotides
Monomers
Bases change

5. 4 Bases Adenine Thymine Cytosine Guanine T C G A Complementary Pairs
For every A you must have a T & every C must have a G.
So if chromosome 1 had

6. DNA Replication Make an exact copy of DNA Ensures new cells get DNA
Mitosis
Meiosis

7. DNA Replication
Helicase (enzyme) unzips the DNA between base pairs

8. DNA Replication
DNA Polymerase (enzyme) adds complementary nucleotides (bases) to each side
What are the next 8 nucleotides the
polymerase in the picture will add? A T C G
Notice direction from right to left….

9. DNA Replication
End Result: 2 IDENTICAL strands of DNA