Microbiology Study Guide I. A chemical agent that inhibits the growth of the bac

Question

Microbiology Study Guide

I. A chemical agent that inhibits the growth of the bacteria but does not kill them is called A. Bacteriostatic B. Bactericide C. Sterilizer D. Pasteurizer E. Disinfectant 2. A surgeon washes her hands with soap and water before a surgery. This is an example of A. Autoclaving B. Pasteurization C. Sanitization D. Degerming E. Sterilization 3. Which of the following structures of hacteria are hard to destroy and are targeted during sterilization process? A. Vegetative cells B. Nucleoid C. Glycocalyx D. Ribosomes E. Endospores 4. With the whole spectrum of agents available to kill or control the growth of microbes, which of the following factor is not important in selection of the agent? A. Application site B. Degree of effectiveness of the agent C. Environmental conditions D. Susceptibility of the microbe E. Shape of the colony formed by the microbe 5. Center for Disease Control and Prevention (CDC) has established biosafety guidelines for the lab personnel and the lab environment When dealing with deadly pathogens that cause diseases such as Ebola, Dengue and smallpox, which level of biosafety level is required when working with the pathogen? A. BSL-1 B. BSL-2 C. BSL-3 D. BSI-4 6. Which of the following technique applies high-pressured steam to raise higher temperature in order to sterilize glassware and culture medium? A. Autoclaving B. Pasteurization C. Sanitization D. Degerming E. Sterilization 7. Pasteurization is a sterilization process used for milk and juices. A. True B. False

Explanation / Answer

1)a)bacteriostatic

Bacteriocidal agents kill the microorganisms

Bacteriostatic agents eg:antibiotics such as chloramphenicol, clindamycin

2)e) sterilization

It is the process of destroying all microorganisms on a given environment

3)e) endospores

It is a tough non reproductive structure

Usually occurs in gram positive bacteria

4)e) shape of the colony formed by the microbe.

Shape is not important but the number of colonies is important in the selection of antimicrobial agents

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