Double Helix

A double helix is the structure of DNA, the molecule that carries genetic information in living organisms. It looks like a twisted ladder, with two long strands spiraling around each other. The sides of the ladder are made of sugar and phosphate molecules, while the rungs consist of paired chemical bases (adenine with thymine, and guanine with cytosine) that connect the strands. This unique shape allows DNA to store and replicate genetic information, making it essential for growth, reproduction, and inheritance in all life forms.