Cellular Control: Protein Synthesis

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  • Created by: tiacoles
  • Created on: 20-01-16 11:34
  • Each gene is a code for the primary structure of a polypeptide.
  • Sequence of bases in DNA determines the sequence of amino acids in the polypeptide (made by ribosomes in the cytoplasm)


  • DNA 'unzips' along the length of the gene.
  • RNA Polymerase matches free RNA nucleotides complementary to the template strand. 
  • This follows base pairing rules. 
  • The other DNA strand has no part in the process. 

Movement of mRNA to Ribosomes

  • When transcription is finished, the mRNA molecules move from the DNA to the ribosome in the cytoplasm. 
  • In eukaryotes, mRNA moves from the nucleus where transcription occurs, through nuclear pores, to ribosomes. 

Amino Acid Activation

  • Enzymes attach amino acids to


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