DNA structure

• DNA


  A polymer made of two strands which wind around each other to form a double helix
• DNA


  • Polymer of molecules called nucleotides
  • Structure is a phosphate group attached to a sugar molecule, which is attached to a base
  • Phosphate group and sugar molecule never change
  • Four different bases: A, C, G and T
  • DNA contains four different nucleotides
• DNA strands

  Complimentary, so the same bases always pair on the opposite strands
• Base pairing


  C is always linked to G and A is always linked to T