Section 10-3 Protein Synthesis (making proteins) - PowerPoint PPT Presentation

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Section 10-3 Protein Synthesis (making proteins)

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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 ... – PowerPoint PPT presentation

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Title: Section 10-3 Protein Synthesis (making proteins)


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
  • gt 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.wm
    v

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

6
  • anticodon
  • gt 3 sequential bases on tRNA
  • gt bonds with codon _at_ 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
(No Transcript)
10
  • http//10.20.0.2/videos/1/86/sec7269_1000k.wmv 2
    min

11
Obj 13 Summarize the process of translation
  • Def Making a polypeptide (strand of amino acids)
    from mRNA template

12
  1. mRNA leaves nucleus

13
  • 2. mRNA goes to ribosome in cytosol

14
  • 3. ribosome reads 1st codon on mRNA

15
  1. tRNA (anticodon) brings specific A.A.

16
  • 5. ribosome moves to next codon on mRNA

17
  • 6. repeat 4

18
  • 7. 2 A.A.s are joined by a peptide bond

19
  • 8. process continues until stop codon is reached

20
  • 9. result is a protein (polypeptide)

21
  • http//10.20.0.2/videos/1/86/sec7269_1000k.wmv

22
  • If protein is translated on a ribosome in the
    cytosol then the protein will be used in the cell

23
  • 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?)

24
  • Human Genome Discovery Channel
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