Multiple Choice
In terms of overall electrostatic charge at physiological pH, what is the net charge of DNA and what structural feature is primarily responsible for it?
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7. DNA and Chromosome Structure
DNA Structure
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In the DNA double helix, what interaction primarily holds the two antiparallel strands together?
A
Hydrogen bonds between complementary nitrogenous bases (A–T and G–C)
B
Ionic bonds between the phosphate groups of the two strands
C
Covalent phosphodiester bonds between nucleotides on opposite strands
D
Peptide bonds between deoxyribose sugars on opposing strands
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