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DNA double helix (Figure 24.30) at the atomic level looks
twisted ladder, where the'tungs" of the ladder consist of
a
You can see that AT base pairs are held together by nuo hydrogen
bonds, and the GC base pairs are held together by three hydrogen bonds. Which base pair is more stable to heating? Why?
that are hydrogen-bonded together. Sugar and
groups make up the sides of the ladder. Shown are
structures of the adenine-thymine (AT) "base pair" and
guanine-cytosine (GC) base pair:
H-
:?
-H
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