The double helix is a description of the molecular shape of a double-stranded DNA molecule. The two helical strands are connected through interactions between pairs of nucleotides, also called base pairs. ...

Is a double helical structure?

​Double Helix

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.

Is a double helix a spiral?

The structure of DNA is a double-helix polymer, a spiral consisting of two DNA strands twisted around each other. James Watson and Francis Crick determined this structure in 1953, building upon almost a century's worth of research from the scientific community.