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Byju's Answer
Standard XII
Chemistry
Types of Hydrogen Bonding
The pairs of ...
Question

The pairs of bases in DNA are held together by:

A
hydrogen bonds
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B
ionic bonds
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C
phosphate groups
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D
deoxyribose groups
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Solution

The correct option is A hydrogen bonds
DNA base pairs are held together by Hydrogen Bonds. Adenine and Thymine have 2 bonds that hold them together while Cysteine and Guanine have 3 bonds that hold them together. The hydrogen bonds generally occur between a Nitrogen and a carbonyl oxygen.
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