Revealing the Genetic Code

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Revealing the Genetic Code

• Protein Synthesis

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Genetics

• Q How do genes (segments of DNA) determine
  genetic traits?
• A one gene ? one protein
• Examples??

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The secret of genes

• Gene sequence of nucleotides (bases)
• Protein sequence of amino acids
• Sequence of bases determines ? sequence of amino
  acids (proteins primary structure)
• Proteins primary structure determines ? its
  secondary tertiary (3D) structures
• Proteins 3D structure determines its function!!

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Puzzle

• Q How do four bases (nucleotides) code for
  twenty amino acids?
• A Triplet code!Three letters ? one amino
  acid(codon)
• But codes (cookbooks) not permitted to leave
  library!

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4. Nucleic acids
Deoxyribonucleic Acid (DNA) - Information
storage (Genetic material)
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Protein Synthesis Prokaryote vs. Eukaryotes
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Genetic Code

• 1 base pair provides 4 choices
• 2 16
• 3 64
• CATSATMAT
• CATSATMAT

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Question

• Which side of ladder is the code?????(see board)

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We know the code!!

• What amino acid does the DNA codon AAA code for?
• What amino acid does the mRNA codon AAA code for?
• What amino acid does the DNA codon CAT code for?
• What does the codon AUG do?

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Genetic Code
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NOW

• You know enough to complete your practice protein
  synthesis assignment!