Question

Why hydrogen bonding between base pairs generates approximately uniform distance between the two strands of helix?

Answer 1

Answer:

The distance between two complementary strands always remains the same because there are hydrogen bonds between the nitrogen bases of two strands restricting movement. The bonds are formed correctly on the opposite ie the bonds are between purines and pyrimidines.

Also, these interactions between nitrogen bases are hydrophobic.

So, the correct option is D.

Answer 2

Answer:

»The bases in two strands are paired through hydrogen bond (H-bonds) forming base pairs (bp)....

»Similarly, Guanine is bonded with Cytosine with three H-bonds.

»As a result, always a purine comes opposite to a pyrimidine.

»This generates approximately uniform distance between the two strands of the helix.

hope it helps you ☺️