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Standard XII
Biology
Nucleotides and Nucleosides
Question

Nucleotides are made up of

  1. Glycerols, fatty acids, and phosphates
  2. Sugars, phosphates, and nitrogenous bases
  3. Amino groups, hydrogens, and carboxyl groups
  4. Protons, neutrons, and electrons
  5. Protons and neutrons only

A
Amino groups, hydrogens, and carboxyl groups
B
Sugars, phosphates, and nitrogenous bases
C
Glycerols, fatty acids, and phosphates
D
Protons, neutrons, and electrons
E
Protons and neutrons only
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Solution
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Nucleotides are composed of three components: a nitrogenous base( purine or pyrimidine), a pentose sugar and phosphoric acid. Thus option B is the correct answer.
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