Genes, cells and populations

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1. What are microvilli?

  • Small finger like extensions on the surface of intestinal cells
  • Small finger like extensions on the surface of epithelial cells
  • Ingrowths of the cell wall
  • Large extensions on the surface of epithelial cells
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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. 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

  • 2 and 4 only are correct
  • 4 only is correct
  • 1, 2 and 3 are correct
  • 1 and 3 only are correct

4. What are the 3 components of the cytoskeleton

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

5. How many membranes in 5ml of hepatocytes?

  • 100m2
  • A tennis court size
  • 10m2
  • 100cm2

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