Key term for OCR GCSE Biology B, used in Inheritance Mechanisms.
The twisted-ladder 3D structure of a DNA molecule, formed of two sugar-phosphate backbones and complementary base pairs.
Double helix appears in OCR GCSE Biology B revision content for Genetics and the Genome, especially Inheritance Mechanisms and Development of Genetics.
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Genetics and the Genome
Genome Structure and Function • DNA Structure
