Questions About Cancer? 1-800-4-CANCER

Understanding Cancer Series

  • Posted: 01/28/2005
  • Reviewed: 09/01/2006

Slide 5

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Gene Subunits

A gene is a working subunit of a DNA molecule.

A gene is any given segment along the DNA carrying a particular set of instructions that allows a cell to produce a specific product--typically, a protein such as an enzyme. There are about 25,000 genes, and every gene is made up of thousands, even hundreds of thousands, of chemical bases.

Gene Subunits