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MHT CET202617 April 2026Morning ShiftChemistryBiomoleculesActual

Which carbon atom (numbered from 1' to 5') of ribose lacks the oxygen to form deoxyribose ?

Options

  1. A5'
  2. B3'
  3. C2'
  4. D1'

Correct answer

C. 2'

Step-by-step solution

Ribose and deoxyribose are pentose sugars found in RNA and DNA respectively. The structure of ribose has a hydroxyl group (-OH) attached to the 2' carbon atom. In deoxyribose, the 2' carbon atom has only a hydrogen atom (-H) attached to it, lacking the oxygen atom present in ribose. Thus, the 2' carbon atom of ribose lacks the oxygen to form deoxyribose. Answer: 2'

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