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Section 10-3 Protein Synthesis (making proteins)

Section 10-3 Protein Synthesis (making proteins). Video human Genome – protiens, amino acids, and rna. Obj 10 : Describe the genetic code. amino acid sequence in a protein is determined by base sequence on mRNA (read 3 at a time = codon ). is nearly universal;

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Section 10-3 Protein Synthesis (making proteins)

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  1. Section 10-3 Protein Synthesis (making proteins) Video human Genome – protiens, amino acids, and rna

  2. Obj 10: Describe the genetic code • amino acid sequence in a protein is determined by base sequence on mRNA (read 3 at a time = codon)

  3. is nearly universal; > different organisms all have the same 4 bases in their DNA

  4. Human Genome Project • http://10.20.0.2/videos/4/19274/chp902892_1500k.wmv

  5. Obj 11: Distinguish b/w codon and anticodon, & where each is found codon: > 3 sequential bases on mRNA > codes for a specific amino acid (carried by the tRNA)

  6. anticodon: > 3 sequential bases on tRNA > bonds with codon @ ribosome

  7. Obj 12: Explain the roles of the start codon and stop codons (See 10-3 AR) Start codon is AUG - codes for amino acid Methionine - starts process of translation

  8. Stop codons are UAA, UAG, and UGA - causes the ribosome to stop translating - does not code for an amino acid

  9. http://10.20.0.2/videos/1/86/sec7269_1000k.wmv 2 min

  10. Obj 13: Summarize the process of translation Def: Making a polypeptide (strand of amino acids) from mRNA template

  11. mRNA leaves nucleus

  12. 2. mRNA goes to ribosome in cytosol

  13. 3. ribosome “reads” 1st codon on mRNA

  14. tRNA (anticodon) brings specific A.A.

  15. 5. ribosome moves to next codon on mRNA

  16. 6. repeat #4

  17. 7. 2 A.A.’s are joined by a peptide bond

  18. 8. process continues until stop codon is reached

  19. 9. result is a protein (polypeptide)

  20. http://10.20.0.2/videos/1/86/sec7269_1000k.wmv

  21. If protein is translated on a ribosome in the cytosol then the protein will be used in the cell

  22. If the protein is translated on a ribosome on the ER then it is exported from the cell • http://10.20.0.2/videos/1/86/sec7270_1000k.wmv 4 min • http://10.20.0.2/videos/1/86/sec7271_1000k.wmv - video quiz (5?)

  23. Human Genome Discovery Channel

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