Components of a DNA Nucleotide
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Questions and Answers

What are the components of a nucleotide in DNA?

  • Phosphate group, ribose sugar, uracil base
  • Phosphate group, deoxyribose sugar, nitrogenous base (correct)
  • Phosphate group, ribose sugar, nitrogenous base
  • Phosphate group, deoxyribose sugar, adenine base

Study Notes

Nucleotide Components in DNA

  • A nucleotide is composed of three main components: a sugar molecule, a phosphate group, and a nitrogenous base.
  • The sugar molecule is deoxyribose, a five-carbon sugar that provides the backbone of the DNA molecule.
  • The phosphate group is a phosphate ion bonded to the 5-carbon sugar, forming a phosphodiester bond.
  • The nitrogenous base is one of four possible bases: adenine (A), guanine (G), cytosine (C), and thymine (T).
  • Adenine (A) always pairs with thymine (T), and guanine (G) always pairs with cytosine (C), forming the rungs of the DNA double helix.

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Description

This quiz covers the essential components that make up a nucleotide in DNA, including the sugar molecule, phosphate group, and nitrogenous base. Test your knowledge on the building blocks of DNA!

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