DNA Structure · Botany

A 'Nucleoside' is composed of:

  1. Pentose Sugar + Phosphate
  2. Nitrogenous Base + Phosphate
  3. Pentose Sugar + Nitrogenous Base
  4. Pentose Sugar + Nitrogenous Base + Phosphate
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Correct answer: Pentose Sugar + Nitrogenous Base

A nucleoside consists only of a nitrogenous base and a pentose sugar. When a phosphate group is added, it becomes a nucleotide.

Difficulty: Medium Question 15 of 20

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