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Cell biology test - mark scheme

I RibosomeII Rough endoplasmic reticulumIII ChloroplastIV LysosomeI. Reduces permeability of the membrane to hydrophilic ionsII. Acts as a channel for ion movementIII. It is amphipathicIV. Reduces fluidity of the membraneI OncogenesII MutagensIII Proto-oncogenesIV MetastasisThere are 32 cells clearly visible. (2 marks)

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