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Cell biology test - mark scheme

I Ribosome II Rough endoplasmic reticulum III Chloroplast IV Lysosome I. Reduces permeability of the membrane to hydrophilic ions II. Acts as a channel for ion movement III. It is amphipathic IV. Reduces fluidity of the membrane I Oncogenes II Mutagens III Proto-oncogenes IV Metastasis There are 32 cells clearly visible. (2 marks) 1 mark for correctly counting the number of cells in phases of mitosis = 8 cells; 1...

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