Multiple Choice
In the context of DNA structure, who is most commonly credited with proposing the double-helix model of DNA in 1953?
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7. DNA and Chromosome Structure
DNA Structure
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In DNA structure, how do the nitrogenous bases bond together to hold the two strands of the double helix in place?
A
By hydrogen bonds between complementary base pairs (A with T, and G with C)
B
By covalent phosphodiester bonds between opposing bases across the two strands
C
By peptide bonds formed between adjacent bases along the same strand
D
By ionic bonds between the bases and the sugar-phosphate backbone
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