The structure of DNA resembles a twisted ladder, the structural components form the rungs of the ladder - nitrogenous base pairs.
DNA molecule has a double helix. A DNA molecule consists of two strands that wind around each other like a twisted ladder.
- Its backbone is made of sugars (deoxyribose) and phosphate groups
- rungs of the ladder are made from 4 nitrogenous bases: Guanine, Adenine, Thymine, and Cytosine.
- Cytosine bonds to Guanine by three hydrogen bonds.
- Adenosine binds to Thymine by two hydrogen bonds.
- two nitrogenous bases bonded to form a rung.
Thus, the structure of DNA resembles a twisted ladder, the structural components form the rungs of the ladder - nitrogenous base pairs.
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