試題詳解

5. Which of the following descriptions regarding double-stranded DNA molecules are correct?
(A) They can exist as A-, B-, or Z-form.
(B) The two strands are antiparallel and complmentary with each other.
(C) An AT-rich DNA sequence (that is, a sequence contains more AT base pairs) is usually more stable than a GC-rich sequence.
(D) The stacking interactions between neighboring base pairs provide stability to a DNA molecule.
(E) The major groove of B-form DNA is wider than the minor groove.