DNA Molecular Model
This Double Helix is a scientific model of B deoxyribonucleic acid, which is the most common form of DNA.
As a teaching mode, it can be used to demonstrate different structural units of DNA:
1. Sugar-Phosphate Backbone, which consists of alternating Sugars (Deoxyribose) and Phosphorus.
2. Oxygen and Hydrogen molecules linking Sugars and Phosphorus.
3. Nitrogenous bases- Adenine, Guanine, Cytosine and Thymine. Nitrogenous bases, Thymine and Cytosine, are known as Pyrimidines; and another pair, Adenine and Guanine, as Purines. Each Nitrogenous base attracts its complementary base: Adenine bonds with Thymine and Cytosine with Guanine.
4. Hydrogen Bonds in between complementary bases: Adenine and Thymine form two hydrogen bonds, and Cytosine and Guanine form three such bonds (in the center of the ladder).
