CUET Preparation Today
| Which part of the nucleotide is responsible for the formation of bonds in DNA double helix? |
Hydroxyl group of sugar Phosphate group
Sugar
Base
|
| Base |
| In a DNA strand, the bases protrude outward whereas the sugar and phosphate lie in a straight chain. The bases pair up in specific pair through hydrogen bonds to form a double helix. Adenine forms two hydrogen bonds with thymine, whereas cytosine forms three hydrogen bonds with guanine. |
