What type of sugar is present in DNA?

  1. pentose
  2. heptose
  3. triose
  4. lactose

Answer (Detailed Solution Below)

Option 1 : pentose
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Detailed Solution

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Concept:

Key Points

Nucleic acids:

  • The role of nucleic acids is to see how carbohydrates, proteins, and enzymes originate in the cell and how they preserve their structural formation.
  • Nucleic acids are defined as the long-chain polymers present in high concentrations in the nuclei of cells in which the monomeric units are nucleotides.
  • The molecules where one of the bases is combined with sugar is called nucleoside.
  • When a phosphate group is also attached to the nucleoside, it is called a nucleotide.
  • Nucleic acids are responsible for the biosynthesis of proteins and the transmission of hereditary characters.

Explanation:

  • There are two types of nucleic acids DNA, RNA.
  • DNA molecules are very large and are found in the nucleus of the cell.
  • On the other hand, RNA molecules are much smaller and are found outside the cell.
  • DNA stands for de-oxy ribonucleic acid. It has a double helix structure.

  • DNA contains nitrogenous bases, a pentose sugar, and phosphate.
  • Two types of nitrogenous bases are there- Purines and pyrimidines.
  • The pentose sugar is given below:

F1 Puja J Anil 05.03.21 D4

Hence, in DNA, a pentose sugar is present.

Additional Information

  •  The complete hydrolysis of DNA yields β-D-2-deoxyribose, phosphoric acid, and adenine.
  •  Partial hydrolysis of DNA yields deoxy Adenosine and phosphoric acid.
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