DNA-Making Proteins B5

(notes taken form the CGP revision guides)

• DNA is a double helix of paired bases.
• A DNA molecule has two strands coiled together in the shape of two spirals.
• Each strand is made up of lots of small groups called "nucleotides".
• Each nucleotide contains a small molecule called a 'base'.
• DNA has just four different bases - adenine (A), cytosine (C), guanine (G) and thymine (T).
• The two strands are held together by the bases, which always pair up in the same way - its always A-T and C-G. This is called base pairing.
• DNA controls the production of proteins in a cell.
• A gene is a section of DNA that contains the instructions for one particular protein.
• Cells make proteins by joining amino acids together in…