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Gene expression


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Published in: Technology

Gene expression

  1. 1. Gene Expression
  2. 3. <ul><li>DNA RNA Proteins </li></ul>Transcription & Translation <ul><li>Transcription is the making of an RNA molecule from a DNA template </li></ul><ul><li>Translation is the construction of an amino acid sequence (polypeptide) from an RNA molecule. </li></ul>Transcription Translation
  3. 5. Information in DNA <ul><li>DNA contains Genes. </li></ul><ul><li>Each Gene is a sequence of nitrogen bases which forms the code for a protein molecule. </li></ul><ul><li>During transcription, the code for one protein is copied into an mRNA molecule. </li></ul><ul><li>This occurs with the help of an enzyme known as RNA Polymerase. </li></ul><ul><li>The mRNA molecule travels to the cytoplasm through the channels in the nuclear membrane </li></ul>
  4. 8. Translation <ul><li>The mRNA attaches with Ribosomes which are the site of protein synthesis. </li></ul><ul><li>tRNA molecules bring amino acids to this complex. </li></ul><ul><li>The Ribosome read the code in the mRNA and add corresponding amino acids into a chain. </li></ul><ul><li>When the Ribosome completes traveling through the mRNA, a chain of amino acids will be produced. </li></ul>