DNA Double Helix Structure Is Stabilized by All of the Following

question 26

Multiple Choice

DNA double helix structure is stabilized by all of the following EXCEPT:

• A) the sugar-phosphate backbones are oriented in opposite directions.
• B) the glycosidic bonds holding paired bases are directly across the helix from one another.
• C) cations such as Mg²⁺ bind to the anionic phosphates.
• D) bases stack together through hydrophobic interactions and van der Waals forces.
• E) appropriate base pairing builds a polymer whose external dimensions are uniform.

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