SCIENCE DNA

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  • IT HAPPENS EVERYWHERE, AND WE DON´T EVEN REALIZE IT.
  • What is it you may ask? DNA replication and the production of proteins!
  • THIS IS ONE OF THE POLAR BEAR'S DNA STRANDS
  • JOHNNY IS GOING TO TELL US HOW IT REPLICATES
  • You see, in a process called transcription, the DNA ¨unzips¨ itself to expose its nitrogenous bases. Then an enzyme replicates the DNA's nitrogenous bases onto the mRNA strand.
  • After this, the newly made mRNA leaves the cell nucleus and looks for a ribosome. Once the mRNA finds one, the ribosome begins the process of turning the mRNA into protein. This process is called translation. The ribosome then reads the mRNA´s
  • nitrogenous bases three at a time to make each section of the protein. As it reads each section of the mRNA, it attaches an amino acid, which is brought by the tRNA. After all of the mRNA is read, there will be a string of amino acids put together, which is the protein.
  •  However, if there is a mutation in the DNA that was read by the mRNA, then there will not be enough correct nitrogenous based to make a protein, which will make the protein either incomplete or incorrect.
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