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  4. In DNA, the consecutive deoxynucleotides are connected by

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Q. In $DNA$, the consecutive deoxynucleotides are connected by

KEAMKEAM 2015Biomolecules

Solution:

When nucleoside is joined to phosphoric acid at $5'$ position of sugar moiety, we get nucleotide. Nucleotide are joined by phosphodiester linkage between $5'$ and $3'$ carbon atoms of pentose sugar.