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NEETZoologyMolecular Basis of Inheritance

What is the linkage formed between the nitrogenous base and OH of 1'C pentose sugar?

Options

  1. APhosphoester linkage
  2. BN-glycosidic linkage
  3. C3'-5' phosphodiester linkage
  4. D3'-5' N-glycosidic linkage

Correct answer

B. N-glycosidic linkage

Step-by-step solution

A nucleotide has three components – a nitrogenous base, a pentose sugar (ribose in case of RNA, and deoxyribose for DNA), and a phosphate group. There are two types of nitrogenous bases – Purines (Adenine and Guanine), and Pyrimidines (Cytosine, Uracil and Thymine). Cytosine is common for both DNA and RNA and Thymine is present in DNA. Uracil is present in RNA at the place of Thymine. A nitrogenous base is linked to the OH of 1' C pentose sugar through a N-glycosidic linkage to form a nucleoside , such as adenosine

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