Multiple Choice
Which set correctly lists the four nitrogenous bases found in DNA?
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7. DNA and Chromosome Structure
DNA Structure
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In the DNA double helix, the two antiparallel strands are primarily held together by which type of interaction?
A
Hydrogen bonds between complementary nitrogenous bases (A with T, and G with C)
B
Covalent peptide bonds between adjacent nucleotides on opposite strands
C
Ionic bonds between the sugar-phosphate backbones of the two strands
D
Phosphodiester bonds linking the bases to each other across the helix
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