E-PolyLearning

186. All of the following are sporicidal except
a. glutaraldehyde
b. ethylene oxide
c. formaldehyde
d. alcohol
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Answer: (d).alcohol

187. Which of the following describes the effect of ionizing radiation on microbes?
a. Changes the 3-dimensional structure of proteins to a 2-dimen-sional form
b. Substantially decreases enzymatic activity, slowing microbial reproduction
c. Induces electrons and protons to jump out of the molecules of the microbe
d. None of the above
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Answer: (c).Induces electrons and protons to jump out of the molecules of the microbe

188. The process of making an object free from living organisms including bacterial and fungal spores and viruses is known as
a. pasteurization
b. antisepsis
c. disinfection
d. sterilization
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Answer: (d).sterilization

189. Media containing spores and thermolabile constituents are sterilized by
a. pasteurization
b. UV radiation
c. dry heat
d. tyndalization
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Answer: (b).UV radiation

190. A(n)____is used to prevent infection by killing or inhibiting pathogen growth on animal tissues.
a. bacteriostatic agent
b. sanitizer
c. disinfectant
d. antiseptic
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Answer: (d).antiseptic