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DNA has a double helix structure, whereby two strands of DNA are wrapped around each other.

The backbone of DNA is made of sugar and phosphate molecules.

DNA has four bases, these bases are A, T, C and G.

A complementary base pairs with T
T complementary base pairs with A
C complementary base pairs with G
G complementary base pairs with C

hydrogen bonds bond the bases together.

hydrogen bonds are do to an electrostatic attraction between oppositely charged bases

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