Multiple Choice
Which statement best describes the structure of a DNA molecule?
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7. DNA and Chromosome Structure
DNA Structure
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In the structure of DNA, which component is primarily responsible for the molecule's overall negative charge at physiological pH?
A
The phosphate groups in the sugar-phosphate backbone
B
The deoxyribose sugars in the backbone
C
Hydrogen bonds between complementary base pairs
D
The nitrogenous bases (A, T, G, C)
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