The triplet code
- Created by: Laura
- Created on: 15-04-14 11:29
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- The triplet code
- Genes are sections of DNA that contain the coded information for making polypeptides. Polypeptides combine to make proteins and so determine the proteins of an organism
- Enzymes are proteins. As enzymes control chemical reactions they are responsible for an organisms development and activities
- In trying to discover how DNA bases coded for amino acids, scientists suggested that there must be a minimum of three bases that code for each amino acid
- Only 20 amino acids regularly occur in proteins
- Each amino acid must have its own code of bases on the DNA
- Only four different bases are present in DNA
- As there are 64 possible codes and only 20 amino acids each amino acid must have more than one code
- In eukaryotes much of the nuclear DNA does not code for amino acids. These sections are called introns and can occur within genes and as a multiple repeats between genes
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