DNA double helix


Beta DNA. Computer representation of a segment of the beta form of the molecule Deoxyribonucleic Acid (DNA). This molecule contains all inherited instructions necessary for the development of a living organism. Atoms are shown as spheres. The DNA molecule is composed of two strands of atoms twisted into a helical shape. Each strand consists of an outer sugar-phosphate backbone (gold) from which the bases project inwardly (silver). The bases are thus paired in a complementary fashion like rungs on a ladder, making up the genetic code. This code is divided into segments called genes. DNA is also the vehicle of genetic inheritance between different generations.

Credit: Kenneth Eward / BioGrafx / Science Source

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