DNA and RNA Molecular Structures

The nitrogenous base pairs in DNA (A-T and C-G) link through the formation of hydrogen bonds within the double-stranded (ds) structure for DNA. 

Nitrogenous Bases, Nucleosides, Nucleotides and Sugars Found in DNA and 

Double-stranded DNA exhibits complementarity in forming the double helix. The complementary sequences have opposite polarity that is, the two chains run in opposite directions as in the following illustration  

Tlie differing conformations of the ribose have been named with respect to that ring atom which puckers out of the plane given by the other ring atoms. The most prominent conformations are C -endo in B-helices and Cy-endo in A-helices. At room temperature, both conformers are in a dynamic equilibrium. Intermediates between Cy-endo and Cy-endo are found in several (time- 

The distance between two subsequent base pairs along the helical axis is called helical rise (h). The pitch (P) is the length of the helix axis for one complete helix turn. The turn angle per nucleotide or twist angle (t) is given by 3607number of nucleotides per turn. Data describing some properties of 

---