Division of Labour: OCR AS level

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  • Created by: Aleena
  • Created on: 23-10-18 11:43
Division of Labour?
when different organelles work together-contributing to the cell's survival e.g.protein synthesis
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First Stage of Protein Synthesis?
1) the nucleolus manufactures ribosomes for protein synthesis in rough ER.
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Second Stage of Protein Synthesis?
2) The instruction to make a protein is contained within a gene on a chromosome within a molecule of DNA. Within the nucleus a copy of that gene is made, using DNA as a template to make the mRNA
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Third Stage of Protein Synthesis?
3) The mRNA leaves the nucleus & attatches to ribosome on the Rough ER.The ribosome reads each triplet code/codon on the mRNA & assembles the protein using amino acids
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Fourth Stage of Protein Synthesis?
4) The assembled protein is pinched off the Rough ER in a vesicle & travels to the Cis face of the Golgi Apparatus-where it is modified.
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Fifth Stage of Protein Synthesis?
5) Then the modified protein travels to the trans face of the Golgi ready to be packaged into a vesicle & then is transported to the plasma membrane where its excreted by Exocytosis
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what is exocytosis?
the vesicles fuse with plasma membrane to secrete the protein
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Card 2

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First Stage of Protein Synthesis?

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1) the nucleolus manufactures ribosomes for protein synthesis in rough ER.

Card 3

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Second Stage of Protein Synthesis?

Back

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Card 4

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Third Stage of Protein Synthesis?

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Card 5

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Fourth Stage of Protein Synthesis?

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