Multiple Choice
Which types of chemical bonds are primarily responsible for holding the two strands of DNA together in the double helix?
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7. DNA and Chromosome Structure
DNA Structure
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In the DNA double helix, what are the “sides” (backbone) of the DNA ladder primarily made of?
A
A polypeptide chain of amino acids linked by peptide bonds
B
A continuous chain of hydrogen bonds between complementary bases
C
Alternating deoxyribose sugars and phosphate groups
D
Alternating nitrogenous bases (A, T, G, C) linked by phosphodiester bonds
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