Genes, cells and populations

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1. What are the 3 components of the cytoskeleton

  • Microfilaments, microtubules and indeterminate filaments
  • Actin, Myosin and Kinesin
  • Microtubules, Microfllaments and intermediate filaments
  • Dynein, Kinesin and Mucin
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2. Why is the nucleus compartmentalized?

  • To enable gene expression to be regulated by post transcriptional modifications
  • To enable different pH's to be established
  • To enable translation of mRNA
  • To enable gene transcription

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

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

4. 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

5. What is the purpose of the centriole

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

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