DNA: the molecule of life

Despite what you may have seen in some textbooks, DNA is not built like a twisted ladder. The helix, or spiral, is an inherent feature of the DNA molecule. Notice, for instance, that in the picture below, that the groove on the left side of the picture is much larger than the right side. This is because the paired bases in the center meet each other at an angle.

http://www.ucmp.berkeley.edu/glossary/gloss3/dna.html

Computer Model of the DNA Helix

http://www.eurekascience.com/ICanDoThat/dna_intro.htm

DNA - Introduction

http://www.dnalc.org/

Dolan DNA Learning Center

http://www.dna.com/home/home.jsp?site=dna&link=Home.htm

DNA Sciences

http://www.thetech.org/exhibits/online/genome/

DNA: the Instruction Manual for All Life

    

http://www.accessexcellence.org/AB/GG/structure.html

Structure of DNA

http://www.blc.arizona.edu/Molecular_Graphics/DNA_Structure/DNA_Tutorial.HTML

Introduction to DNA Structure

http://www.chemicalgraphics.com/paul/DNA.html

DNA Graphics Created with PovChem

http://www.biology.washington.edu/fingerprint/dnaintro.html

Basics of DNA Fingerprinting

http://www.genome.ou.edu/protocol_book/protocol_index.html

PROTOCOLS FOR RECOMBINANT DNA ISOLATION, CLONING, and SEQUENCING

http://www.dnaftb.org/dnaftb/

DNA from the beginning

http://dna2z.com/DNA-o-gram/

DNA-o-gram Generator

http://www.cbs.dtu.dk/services/GenomeAtlas/

DNA Structural Analysis of Sequenced Microbial Genomes

http://www.ornl.gov/hgmis/elsi/forensics.html

DNA Forensics

http://www.pbs.org/wgbh/aso/tryit/dna/

DNA Workshop