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DNA  PROTEIN

DNA  PROTEIN. The Story of Protein Synthesis. DNA  PROTEIN. http://www.youtube.com/watch?v=983lhh20rGY. DNA  PROTEIN. DNA contains instructions for copying itself DNA also contains instructions for Making mRNA (Messenger RNA) Making proteins (but ribsomes do the work)

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DNA  PROTEIN

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  1. DNA  PROTEIN The Story of Protein Synthesis

  2. DNA  PROTEIN • http://www.youtube.com/watch?v=983lhh20rGY

  3. DNA  PROTEIN • DNA contains instructions for copying itself • DNA also contains instructions for • Making mRNA (Messenger RNA) • Making proteins (but ribsomes do the work) • DNA = double strand, RNA = single strand

  4. DNA  PROTEIN • DNA’s genetic message = specific order of nucleotides on the DNA chain • They’re not just stuck randomly stuck on! • Nucleotide order (or sequence) is a coded language • Code determines an organism’s traits

  5. DNA  PROTEIN • TRANSCRIPTION MAKES mRNA • Transcription = making a copy • TRANSLATION MAKES PROTEINS • Translation = reading the copy & putting it in a different “language” • RIBOSOMES DO THIS • DNA  mRNA  PROTEIN

  6. DNA  PROTEINTranscription • DNA is unzipped • mRNA strand is made (synthesized) kind of like DNA is made during replication • mRNA uses Uracil (U) instead of Thymine (T) • In transcription (A+U) and (C+G)

  7. DNA  PROTEINTranscription • WHY CAN’T PROTEINS JUST BE TRANSLATED RIGHT FROM DNA? • Using RNA provides protection for DNA & its info • Using RNA allows more protein copies to be made at the same time • BLUEPRINT EXAMPLE

  8. DNA  PROTEINTranscription • http://www.youtube.com/watch?v=OtYz_3rkvPk

  9. DNA  PROTEINTranslation • In translation, RIBOSOMES read the “code” and make chains of amino acids based on what the code is telling them. • Chains of amino acids = proteins

  10. DNA  PROTEINTranslation CRACKING THE CODE • mRNA code is a triplet code • 3 N-bases read together = codon • Codons tell which amino acid to make • AUG = start (or Met) • UAA, UAG, UGA = stop

  11. DNA  PROTEINTranslation • http://www.youtube.com/watch?v=HQYH7mDqkm0

  12. DNA  PROTEINTranslation • DNA says • ACCAAACCG • RNA replies • UGGUUUGGC • Ribosomes make • Trp-Phe-Gly

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