DNA

• Deoxyribonucleic Acid (DNA)


  • DNA is a double helix comprising two strands of nucleotides
  • Nucleotide formed of a sugar, a phosphate group and one of four different bases.

  
• Complementary Base Pairing


  • Adenine bonds with thymine
  • Cytosine bonds with guanine.
• Chromosomes


  • A DNA molecule wraps around special proteins to form chromosome.
• DNA vs RNA

  • DNA is a double stranded, RNA is single stranded
  • Thymine (T) is only found in DNA
  • Uracil (U) is only found in RNA
  • In RNA, U replaces T and is complementary to adenine (A)