MCQ revision

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1. Gram positive bacteria are distinguishable by

  • thick peptidoglycan layer that doesn't decolourise iodine so stains violet
  • think peptidoglycan layer which does decolourise iodine so stains violet
  • thin peptidoglycan layer between plasma membranes which does decolourise iodine so stains pink
  • thick peptidoglycan layer which doesn't decolourise iodine so stains pink
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2. pasteurization is

  • the freezing of microorganisms
  • the removal of microorganisms using heat
  • the processing of food to endure no microorganisms are present

3. transformation is the transfer of DNA via

  • a pili
  • uptake by recipient cell of naked DNA that is released into the environment
  • bacteriophage

4. Bacterial cells grow according to which order

  • lagging, growth, stationary, death
  • lagging, exponential, stationary, death
  • stationary, exponential, lagging, death
  • stationary, growth, lagging, death

5. a nosocomial infection is one

  • acquired in a hospital
  • in the nasal passage
  • has developed resistance

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