BiologyExchange.co.uk Shared Resource

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BiologyExchange.co.uk Shared Resource

  1. 1. A molecule of MRNA leaves the Through a nuclear pore nucleusAmino acids are joined together The polypeptide chain enters the by peptide bonds at the rough endoplasmic reticulum ribosomeThe polypeptide travels through The polypeptide moves through the rough endoplasmic the cell in a transport vesicle reticulum The polypeptide is processed The protein molecule ‘buds-off’into a finished protein molecule the Golgi body in a vesicle in the Golgi bodyThe protein moves through the The protein leaves the cell by cell in a secretory vesicle exocytosis The vesicle fuses with the The vesicle fuses with the Golgismooth endoplasmic reticulum body The vesicle fuses with the nucleus
  2. 2. Cells without a true nucleus. The Prokaryotic cells organisms that have these cells are the bacteria This structure is made of a Cell wall glycoprotein called murein This is a structure longer than the Flagellum (sing) cell and it can propel the cell (not Flagella (pl) always present) The are of the cytoplasm where a Nucleoid single circular chromosome is found A small circlet of DNA containing Plasmid only a few genes A thick sticky layer outside the cell wall. It makes bacteria stickyCapsule/Slime layer and prevents them drying out (not always present) Ribosomes The smaller (70s) version

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