As a double stranded helix, each nucleotide within a DNA molecule displays base pairing between nitrogenous bases. Which statement best describes the correct base pair and number of hydrogen bonds between them?
A. Adenine and thymine pair with two hydrogen bonds
B. Adenine and thymine pair with three bonds
C. Cytosine and Guanine pair with two bonds
D. All four bases can pair and make two bonds
Answer:D
As a double stranded helix, each nucleotide within a DNA molecule displays base pairing between nitrogenous bases. Which statement best describes the correct base pair and number of hydrogen bonds between them?
A. Adenine and thymine pair with two hydrogen bonds B. Adenine and thymine pair with three bonds C. Cytosine and Guanine pair with two bonds D. All four bases can pair and make two bonds