DNA

DNA:

• A DNA molecule has two strands coiled together in the shape of a double helix.

• The stands are held together by bases. There are four different bases:
  • Adenine
  • Cytosine
  • Guanine
  • Thymine

• The bases are always paired:
  • A - T
  • C - G

• The base pairs are joined together by weak hydrogen bonds.

• …