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DNA (deoxyribonucleic acid)

The long, spiralling m olecule that rchestrates the cell's daily operations and provides the genetic blueprint for the physical characteristics of all living organisms. When made up of two strands, the strands intertwine like a spiral staircase to form a structure called a doub le helix. Subunits, called Bases, are the rungs of the staircase. See also RNA.

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