EuanModel DNA looks like a spiral two with small structures, such as beads between spiral. These beads appear to be rung in the shape of a spiral staircase. Called scientific spiral into a double helix.
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honeymarhaeny
Double helix . DNA consists of two polynucleotide strands of yarn that are twisted to form a double helix
DNA consists of two polynucleotide strands of yarn that are twisted to form a double helix