Question:

The sugar produced after complete hydrolysis of DNA is

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DNA contains 2-deoxy-D-ribose, a five-carbon sugar; complete hydrolysis yields phosphoric acid, this pentose and the nitrogenous bases.
Updated On: Oct 31, 2026
  • a pentose sugar.
  • a hexose sugar.
  • a polysaccharide.
  • a disaccharide.
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The Correct Option is A

Solution and Explanation

Step 1: DNA is a polymer of nucleotides, each made of a phosphate, a pentose sugar and a nitrogenous base.
Step 2: In DNA the sugar is 2-deoxy-D-ribose (C5H10O4), a pentose.
Step 3: Complete hydrolysis therefore gives phosphoric acid, 2-deoxy-D-ribose (a pentose sugar) and the four bases A, G, C and T.
Answer: (A) a pentose sugar
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