GCSE Biology - Describe the structure of DNA and how does this structure affect the proteins made in protein synthesis.

Structure of DNA DNA is a polymer, which is a large molecule made up of smaller, repeating molecules called monomers, specifically referred to as nucleotide bases. These bases continuously repeat along two long strands which twist around each other to form a spiral shape - known as the double helix. There are four types of nucleotide bases: A, T, C and G. Each nucleotide consists of a common sugar and phosphate group with one of four different bases attached to the sugar.One nucleotide on one strand will only pair with a certain nucleotide on the second strand.A always pairs with T. C always pairs with G.These are called complementary base pairs.
Proteins are polymers too, so they are also made up of smaller, repeating molecules, but in this case, they are known as amino acids.
Each amino acid is coded for by a 'triplet code', which is formed by the sequence of three base codes. A chain of these bases will tell you the order of amino acids that will form that protein.