DNA

Sections of DNA are called genes. The genes carry coded instructions to make proteins. Proteins are made from long chains of amino acid molecules

The DNA molecule is shaped like a twisted rope ladder, the shape is called a double helix. DNA is held together by two different pairs of bases. These are A-T and C-G.

Each group of three bases in the gene provides the code to make one amino acid. The gene has all of the base triplets needed to link up all of the different amino acids needed to make a protein. The proteins are made in the cell cytoplasm and some of these proteins are enzymes that control the cell.