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Biology · BIOMOLECULES

हिन्दी

Which of the following compounds is a nucleotide, and how does it structurally differ from a nucleoside?

  1. A
    Adenosine; contains a nitrogen base linked to phosphate without a ribose sugar
  2. B
    Uridine; contains a heterocyclic nitrogen base esterified directly to a phosphate group
  3. C
    Cytidine; contains three phosphate groups attached directly to the pyrimidine ring
  4. D
    Uridylic acid; contains a phosphate group esterified to the sugar of a nucleoside
View Answer & Solution

Correct answer · Option D

Uridylic acid; contains a phosphate group esterified to the sugar of a nucleoside

Explanation

Adenosine, uridine, and cytidine are nucleosides (nitrogen base + sugar). When a phosphate group is esterified to the sugar moiety of a nucleoside, it forms a nucleotide, such as uridylic acid or adenylic acid.

Related questions

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