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Double helix, as related to genomics, is a term used to describe the physical structure of dna When all the base pairs in a dna double helix melt, the strands separate and exist in solution as two entirely independent molecules The structure of dna is called a double helix, which looks like a twisted staircase
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The sugar and phosphate make up the backbone, while the nitrogen bases are found in the center and hold the two strands together. That the dna molecule exists in the form of a. The sugar and phosphate lie on the outside of the helix, forming the dna’s backbone.
Dna has the shape of a double helix, just like a spiral staircase (figure below)
As a nucleic acid, dna is composed of nucleotide monomers, consisting of the deoxyribose sugar, a phosphate group, and a nitrogenous base (a, c, g or t). The double helix has a major and minor groove, which serve as binding sites for proteins involved in gene expression The helical structure compacts dna, enabling it to fit within the cell nucleus while remaining functional. Without the scientific foundation provided by these pioneers, watson and crick may never have reached their groundbreaking conclusion of 1953
