1. Structure of Nucleic Acid Constituents

2. Deoxynucleotides of DNA

3. Tautomeric Equilibria

4. Keto-Enol and Amino-Imino Equilibria

5. Structure of Minor Nucleic Acid Bases

6. Possible Hydrogen Bonding between Adenine and Uracil

7. Puckered Conformations of the Pyranose Ring

8. C3’-endo and C2’-endo Conformation of Pyranose

9. Conformation of the Nucleotide Unit

10. Schematic Representation of X-Ray Fiber Diffraction

11. Segment of a Polydeoxynucleotide

12. Hydrogen-bonded Base Pairs in DNA

13. Models of DNA

15. Comparative X-ray Diffraction Pattern of Different DNA forms

16. Transition Diagram of different DNA Forms and RNA

17. Spacefilling Models of Z-DNA, B-DNA, and A-RNA

18. Spacefilling Model of Z-DNA and B-DNA

19. Comparison of Structural Features of A-, B-, and Z-DNA

20. Size of DNA Molecules as a Function of Organism

21. DNA-melting Curves as a Function of Temperature and GC-Content

22. Melting Temperature of Different DNAs as a Function of GC-content and
Buffer Concentration

23. Theoretical Second Structure Model of rRNA

24. Structure of tRNA