Genes and the genetic code

What is a gene?:

• A section of DNA that contains the coded information for making polypeptides and functional RNA
• Located on a locus of a DNA molecule
• Codes for - the amino sequence of a polypeptide or a functional RNA including ribosomal RNA and transfer RNAs

The genetic code:

Must be a minimum of 3 that coded for each amino acid because -

• Only 20 different 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
• If each…