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3 Written questions

3 Multiple choice questions

  1. process by which some organisms, such as certain bacteria, use chemical energy to produce carbohydrates
  2. the assimilation of atmospheric nitrogen by soil bacteria and its release for plant use on the death of the bacteria
  3. type of spore formed when a bacterium produces a thick internal wall that encloses its DNA and a portion of its cytoplasm

2 True/False questions

  1. toxinthe act of making or becoming a single unit, In bacteria, the direct transfer of DNA between two cells that are temporarily joined.


  2. obligate aerobean organism that cannot grow in the presence of oxygen


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