the genetic code

• what does dna store and how

  genetic information in a sequence of bases
• what does the sequence of bases determine

  the sequence of amino acids that are joined together to form a polypeptide
• what is meant by the one gene- one polypeptide


  some proteins contain more then one polypeptide
• what is a gene

  segment of DNA that codes for a protein
• what is a triplet code

  this when three bases code for an amino acid
• How many amino acids are there?

  20
• How many possible codons are there?

  64
• what are the three features of the genetic code

  The code is degenerate, The code is non-overlapping,The code is universal.
• what is meant by the genetic code being universal

  the same triplet codes for the same amino acid in all organisms
• what is meant by the genetic code being non overlapping

  each base in the sequence occurs in only one triplet
• what is meant by the genetic code being degerate

  there are more then one codon can that code for a specific amino acids
• what is the start codon for a base sequence

  aug
• what are the possible stop codons for a base sequence

  uag ,uga and uaa