1. Agarose Electrophoresis of Plasmid DNA

2. Electrophoretic Behavior of Relaxed and Supercoiled Plasmid DNA

3. Electron Micrographs of Circular Duplex DNAs

4. Topological States of Circular DNA

5. Interrelationship between twist and writhe

6. Example of a Modern Plasmid

7. Recognition and Cleavage Sites of Type II Restriction Enzymes

8. Restriction Digest and Restriction Map of Plasmid DNA

9. Electron Micrograph of a Human Metaphase Chromosome

10. Meselson – Stahl Experiment to Establish Mode of Replication

11. Fiber Autoradiography of Replicating DNA

12. Properties of DNA Polymerases I, II, and III of E.coli

13. Domain Structure of DNA Polymerase I

14. Processivity of Various DNA Polymerases

16. Space-filling Model of the Crystal structure of the Large Fragment of
E.Coli DNA Polymerase I