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In DNA, the linkages between different nitrogenous bases are:

1. peptide linkage
2. phosphate linkage
3. H-bonding
4. glycosidic linkage

Correct answer: H-bonding

Solution

In DNA, nitrogenous bases are connected through hydrogen bonds (H-bonding). Adenine pairs with thymine via two H-bonds, and cytosine pairs with guanine via three H-bonds.

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