Genes, cells and populations

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1. Why do cells and organelles have different compartments? 1. to sequester toxic substances 2. To simplify the metabolic system 3. to maintain different environments in different parts in the cell 4. to enable them to produce toxins

  • 4 only is correct
  • 1 and 3 only are correct
  • 1, 2 and 3 are correct
  • 2 and 4 only are correct
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2. What is the purpose of the centriole

  • To initiate microtubules and organise spindle fibres
  • To reinforce the cell's shape
  • To make spindle fibres
  • Acts as a track way for organelle transport

3. What are the plasmodesmata?

  • Pores in the cell membrane of the plant cell
  • Cytoplasmic channels to enable cell to cell communication between plant cells
  • Cytoplasmic channels to enable cell to cell communication between animal cells
  • Channels which water travel through in the plant cells

4. What is the estimate of the amount of protein in the cytosol

  • 2.0 mg ml
  • 20 - 30%
  • 280 mg ml
  • 200 ng ml

5. What are the 3 components of the cytoskeleton

  • Microfilaments, microtubules and indeterminate filaments
  • Microtubules, Microfllaments and intermediate filaments
  • Dynein, Kinesin and Mucin
  • Actin, Myosin and Kinesin


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