DNA double helix

The DNA double helix is the structure of our genetic material, resembling a twisted ladder or spiral staircase. It consists of two long strands made of smaller building blocks called nucleotides, which pair specifically: adenine with thymine, and cytosine with guanine. These pairs are like the rungs of the ladder, while the sugar and phosphate molecules form the sides. The twisting shape allows DNA to efficiently store and replicate genetic information in cells, guiding the development and functioning of living organisms. This elegant structure is fundamental to how genetic instructions are maintained and passed on.