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4 Written questions

4 Multiple choice questions

  1. bacterial viruses with a polyhedral head & a helical tail.
  2. contains only a nucleic acid.
  3. is the protective outer coat.
  4. the virus that causes AIDS.

4 True/False questions

  1. Viruseshave nuclei & organelles.


  2. Tobacco virusconsists of a protein coat & a nucleic acid core.


  3. typical viruscauses disease in tobacco plants.


  4. clearcutting of forestsis most closely associated with emerging viruses.