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Home Questions MZRA7PDUFV
Target Exam

CUET

Subject

Chemistry

Chapter

Organic: Biomolecules

Question:
Which part of the nucleotide is responsible for the formation of bonds in DNA double helix?
Options:
Hydroxyl group of sugar
Phosphate group
Sugar
Base
Correct Answer:
Base
Explanation:
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.

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