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Sugar moiety in DNA and RNA molecules respectively are (1) β-D-2-deoxyribose, β-D-ribose (2) β-D-2-deoxyribose, β-D-ribose (3) β-D-ribose, β-D-2-deoxyribose (4) β-D-2-deoxyribose, β-D-2-deoxyribose

1. β-D-2-deoxyribose, β-D-ribose
2. β-D-2-deoxyribose, β-D-ribose
3. β-D-ribose, β-D-2-deoxyribose
4. β-D-2-deoxyribose, β-D-2-deoxyribose

Correct answer: β-D-2-deoxyribose, β-D-ribose

Solution

The correct option identifies the sugar components of DNA and RNA accurately; DNA contains β-D-2-deoxyribose, which lacks one oxygen atom compared to RNA's β-D-ribose, making this distinction crucial for understanding their structural differences.

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