First slide

The DNA

Question

The uniform distance between the two strands of the helix is due to

Easy

A

Right-handed coiling of DNA
B

Presence of purine opposite to pyrimidine in the double helix
C

Presence of phosphodiester linkage between two nucleotides
D

Presence of phosphoester linkage in DNA

Solution

Always a purine comes opposite to a pyrimidine. This generates approximately uniform distance between the two strands of the helix.

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