The model is constructed from only six different molecular parts and depicts 16 nucleotide pair’s worth of DNA (8 AT 8 GC pairs). The base pairs are manufactured in a single plastic piece as are the sugar and phosphate units.  Because there are only nine molecular parts per nucleotide pair which snap together by means of a pop-it bead mechanism, the model can be easily assembled. The model is unpainted and may be painted by students in a 5-6  hour period. A laboratory exercise and problem set accompany the model. After completing the laboratory exercise and problem set, students will have a better understanding of the aspects of the structure, function, and properties of DNA. Model Demonstrates:   · Anti-parallel DNA strands · 20 Nucleotide Pairs / Revolution · 5" and 3" Ends of DNA Strands   Features of Model:   · Convenient scale: 1cm = 1A · Stained base · Plastic Opaque Stand · 24" high x 8" wide · Easy to assemble · Pop bead connections · Only 6 different molecular parts