What Molecules Make Up a Gene? Understanding DNA and Nucleotides

Discover the molecules that compose a gene, including DNA nucleotides adenine, guanine, cytosine, and thymine, and their role in genetic coding.

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Genes are composed of DNA (deoxyribonucleic acid), which is made up of four types of molecules called nucleotides: adenine (A), guanine (G), cytosine (C), and thymine (T). These nucleotides form the double helix structure of DNA, where A pairs with T, and C pairs with G, coding the genetic information necessary for the development, functioning, and reproduction of living organisms.

FAQs & Answers

  1. What are the four nucleotides that make up DNA? The four nucleotides that constitute DNA are adenine (A), guanine (G), cytosine (C), and thymine (T).
  2. How do nucleotides pair in the DNA double helix? In DNA, adenine pairs with thymine (A-T) and cytosine pairs with guanine (C-G) to form the double helix structure.
  3. What role do genes play in living organisms? Genes code the genetic information necessary for development, functioning, and reproduction of living organisms.
  4. Is DNA the only molecule that makes up genes? Yes, genes are composed of DNA, which is made up of nucleotide molecules.