In the Watson-Crick model of DNA structure (now called B-form DNA):
A) a purine in one strand always hydrogen bonds with a purine in the other strand.
B) A-T pairs share three hydrogen bonds.
C) G-C pairs share two hydrogen bonds.
D) the 5' ends of both strands are at one end of the helix.
E) the bases occupy the interior of the helix.

Question

Quizplus · Accepted Answer

In the Watson-Crick model of DNA, the bases (both purines and pyrimidines) are oriented towards the interior of the helix, allowing them to form hydrogen bonds with complementary bases on the opposite strand. This arrangement is crucial for the stability of the DNA structure and for the accurate replication of genetic information.

In the Watson-Crick Model of DNA Structure (Now Called B-Form