Q78 / 180 · AIIMS 2019 (25 May) · Chemistry

Nucleosides are Figure

  • A
    $A$ and $B$
  • Correct answer
    B
    $B$ and $C$
  • C
    $C$ and D
  • D
    $\mathrm{D}$ and $\mathrm{A}$.

Solution

A combination of a nitrogen base with a pentose sugar is known as nucleoside. The given figure $\mathrm{B}$ is of adenosine (adenine + ribose) while $C$ is of uridine (uracil + ribose). $\mathrm{A}$ is nitrogen base adenine (purine) and $\mathrm{D}$ is adenylic acid (nucleotide)

Hence, the correct answer is option: 'B'.

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