Multiple Choice
In the structure of DNA, what molecules form the sugar-phosphate backbone of each strand?
7. DNA and Chromosome Structure
DNA Structure
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In the DNA double helix, what type of interaction holds complementary bases together across the two strands?
A
Covalent bonds between complementary bases across the helix
B
Phosphodiester bonds between the nitrogenous bases
C
Hydrogen bonds between complementary base pairs (A–T and G–C)
D
Ionic bonds between the sugar-phosphate backbones
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