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