What is the shape of DNA described as?

DNA is described as a double helix, which is a specific structure characterized by two long strands of nucleotides that wind around each other. This shape resembles a twisted ladder, where the sides of the ladder are formed by the sugar-phosphate backbone of the DNA strands, and the rungs consist of paired nitrogenous bases held together by hydrogen bonds. The double helix structure is integral to the function of DNA, as it allows for the processes of replication and transcription to occur effectively.

In contrast, a square does not relate to the structure of DNA. Similarly, while circles and spirals may describe certain physical forms, they do not accurately represent the unique double helix configuration of DNA. The specificity of the term "double helix" captures the complexity and functionality of DNA far better than these alternative shapes.