The directional nature of the DNA double helix is observed in the
A) locations of the hydrogen bonds.
B) locations of the numbered carbons in the sugars.
C) locations of the oxygen atom in the phosphate.
D) double helix when it is separated into single strands.
E) mirror.

Question

Quizplus · Accepted Answer

The numbered carbons in the sugars (specifically, carbon #5 and carbon #3) are directional and determine the polarity of the DNA strand. This polarity affects the way the strands of DNA align and pair together in the double helix.

The Directional Nature of the DNA Double Helix Is Observed