Ultraviolet radiation at the bactericidal wavelength destroy bacteria by

Ultraviolet radiation at the bactericidal wavelength destroy bacteria by
 
  A. destroying endospores.
  B. damaging nucleic acid.
  C. preventing spore formation.
  D. denaturing proteins.

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Microwaves do not kill organisms directly but kill by
 
  A. the heat they generate in a product.
  B. generating free radicals.
  C. generating toxins.
  D. creating thymine dimers.

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Which would be most effective against Pseudomonas?
 
  A.
  Alcohol
 
  B.
  Radiation
 
  C.
  Quaternary ammonium compounds
 
  D.
  Iodophors

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Gamma irradiation
 
  A. has not been approved for use on food.
  B. can be used to either sterilize or pasteurize, depending on the dose of radiation.
  C. leaves some radioactive particles in the treated substance.
  D.
  usually kills by generating heat and denaturing proteins.

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Liquid media containing heat-sensitive components would best be sterilized by
 
  A.
  ultraviolet (UV) light at 500 nm.
 
  B. freezing.
  C. lyophilization.
  D. membrane filtration.