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Unformatted text preview: a. P on #5C of one nucleotide b. #3C on next nucleotide 3. Two chains combined in ladder-like arrangement a. Sides of ladder - sugar and phosphate b. Rungs of ladder - two nitrogen bases 4. Pairing of N bases is specific a. Adenine to thymine - 2 weak hydrogen (H) bonds b. Guanine to cytosine - 3 weak H bonds D. Antiparallel structure of DNA 1. Chains of nucleotides - opposite directions 2. One side - 5 to 3 side 3. Opposite side - 3 to 5 side 4. Two sides twist double helix ( see fig. in text)...
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