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Why is the DNA structure a double helix?

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Double helix is the description of the structure of a DNA molecule. A DNA molecule consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating groups of sugar (deoxyribose) and phosphate groups. read more

The (double) helix structure is the first step that helps making the DNA molecule shorter (followed by further folding steps) - to enable quizzing the long molecules into the tiny volume of the nucleus. read more

A DNA double helix consists of two spiral chains of deoxyribonucleic acid. The shape is similar to that of spiral staircase. DNA is a nucleic acid composed of nitrogenous bases (adenine, cytosine, guanine, and thymine), a five-carbon sugar (deoxyribose), and phosphate molecules. read more

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