The two strands of DNA intertwine to form a structure called the?

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Multiple Choice

The two strands of DNA intertwine to form a structure called the?

Explanation:
Two strands of DNA intertwine to form a double helix. In this structure, the sugar–phosphate backbones run on the outside while the bases pair between strands (A with T, G with C) through hydrogen bonds, holding the two strands together. The strands are antiparallel, meaning they run in opposite directions, and base stacking among the paired bases adds stability. This canonical, right-handed helix is the familiar form of DNA and contrasts with other terms: an alpha helix or beta sheet are protein secondary structures, not DNA; a random coil is an unstructured region with no defined geometry. So the intertwining strands constitute the double helix.

Two strands of DNA intertwine to form a double helix. In this structure, the sugar–phosphate backbones run on the outside while the bases pair between strands (A with T, G with C) through hydrogen bonds, holding the two strands together. The strands are antiparallel, meaning they run in opposite directions, and base stacking among the paired bases adds stability. This canonical, right-handed helix is the familiar form of DNA and contrasts with other terms: an alpha helix or beta sheet are protein secondary structures, not DNA; a random coil is an unstructured region with no defined geometry. So the intertwining strands constitute the double helix.

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