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(D) In $DNA$ (Deoxyribonucleic acid),the sugar is $2$-deoxyribose,which lacks a hydroxyl $(-OH)$ group at the $2^{nd}$ carbon position.In $RNA$ (Ribon

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$2^{nd}$

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(D) In $DNA$ (Deoxyribonucleic acid),the sugar is $2$-deoxyribose,which lacks a hydroxyl $(-OH)$ group at the $2^{nd}$ carbon position.In $RNA$ (Ribonucleic acid),the sugar is ribose,which contains a hydroxyl $(-OH)$ group at the $2^{nd}$ carbon position.Therefore,the structural difference between the sugars of $DNA$ and $RNA$ is at the $2^{nd}$ carbon atom.

The difference between $DNA$ and $RNA$ is based on the presence or absence of a hydroxyl group at which carbon atom of the sugar molecule?

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