1. Bidirectional Replication of a Circualr Chromosome

2. Bidirectional Replication at the Origin

3. The Replication Fork

4. The lagging Strand

5. Replication of Leading and Lagging DNA Strands
                                                                                      

6. EM Picture of a Replication Fork

7. Replication of DNA by Complementary Base Pairing
                                                                           

8. The Trombone View of the Replication Fork

9. The Sliding Clamp

10. Semi-conservative Replication
                                                      

11. Conservative Replication.
                                                       .
                                                      

12. Meselson-Stahl Experiment