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  4. In both DNA and RNA, heterocylic base and phosphate ester linkages are at:

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Q. In both DNA and RNA, heterocylic base and phosphate ester linkages are at:

AIEEEAIEEE 2005Biomolecules

Solution:

Synthesis of RNA/DNA from phosphoric acid, ribose and cytosine is given below
Thus ester linkages are at $C'_5$ and $C'_1$ of sugar molecule.

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