Sugar moiety in DNA and RNA molecules respectively are

Question

Canvas Classes · Accepted Answer

Sugar components of nucleic acids:

| Nucleic acid | Sugar | Key feature |
|---|---|---|
| DNA | -D-2-deoxyribose | No –OH at C2' (deoxy = missing oxygen at C2') |
| RNA | -D-ribose | Has –OH at C2' |

Structures:
- -D-ribose:  (furanose form), –OH at C1', C2', C3', C5'
- -D-2-deoxyribose:  (furanose form), –H at C2' (no –OH)

The absence of the 2'-OH in DNA makes it more stable than RNA (the 2'-OH in RNA can participate in hydrolysis reactions).

Final Answer: Option (3) — -D-2-deoxyribose, -D-

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