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JEE Main · 2022 · 29 Jun 2022 · Shift 1 · Biomolecules

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Sugar moiety in DNA and RNA molecules respectively are
  1. (A)-D-2-deoxyribose, -D-deoxyribose
  2. (B)-D-2-deoxyribose, -D-ribose✓ Correct
  3. (C)-D-ribose, -D-2-deoxyribose
  4. (D)-D-deoxyribose, -D-2-deoxyribose

Answer: (B)

Solution

DNA (deoxyribonucleic acid) contains -D-2-deoxyribose as its sugar moiety, which lacks a hydroxyl group at the 2' position. RNA (ribonucleic acid) contains -D-ribose, which has a hydroxyl group at the 2' position. The answer is (B).

JEE Main · 2022 · 29 Jun 2022 · Shift 1 · Single correct option

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