Question 1

Which of the following is a function of pasteurization?

Accepted Answer

A) Killing pathogenic microorganisms 
B) Reducing the total microbial population 
C) Increasing the shelf life of the product 
D) All of the choices are correct. 
A) Killing pathogenic microorganisms 
B) Reducing the total microbial population 
C) Increasing the shelf life of the product 
D) All of the choices are correct.

Question 2

An experiment was done to determine the decimal reduction time of a specific population of organisms at 80oC.The data is indicated by an arrow on the graph.Which labeled line represents the likely results if the experiment was repeated using a lower temperature?

Accepted Answer

A) Line A 
B) Line B 
C) Line C 
D) Line D   
A) Line A 
B) Line B 
C) Line C 
D) Line D

Question 3

Because filtration removes rather than destroys microorganisms,it does not truly sterilize the materials passing through the filter.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following would be most appropriate for removal of bacteria and viruses from a liquid?

Accepted Answer

A) HEPA filter 
B) N95 filter 
C) Membrane filter (0.01µm) 
D) Depth filter (diatomaceous earth) 
A) HEPA filter 
B) N95 filter 
C) Membrane filter (0.01µm) 
D) Depth filter (diatomaceous earth)

Question 5

Which of these is an agent that is used to sterilize the plastic tubing of heart-lung machines?

Accepted Answer

A) Phenol 
B) Mercaptoethanol 
C) Ethylene oxide 
D) 70% ethanol 
A) Phenol 
B) Mercaptoethanol 
C) Ethylene oxide 
D) 70% ethanol

Question 6

Disinfectants are generally regulated by the

Accepted Answer

A) Food and Drug Administration. 
B) Environmental Protection Agency. 
C) The National Institutes of Health. 
D) Centers for Disease Control and Prevention. 
A) Food and Drug Administration. 
B) Environmental Protection Agency. 
C) The National Institutes of Health. 
D) Centers for Disease Control and Prevention.

Question 7

Joseph Lister

Accepted Answer

A) pioneered the use of gamma rays for sterilizing food. 
B) demonstrated that microorganisms are carried on dust particles in the air. 
C) revolutionized surgery by introducing phenol as a disinfectant. 
D) designed and built the first autoclave. 
A) pioneered the use of gamma rays for sterilizing food. 
B) demonstrated that microorganisms are carried on dust particles in the air. 
C) revolutionized surgery by introducing phenol as a disinfectant. 
D) designed and built the first autoclave.

Question 8

Which of the following would be most effective and practical for routine home disinfection of a kitchen sponge between uses?

Accepted Answer

A) 70% Isopropyl alcohol 
B) Iodophor 
C) Chlorine bleach 
D) Hydrogen peroxide 
A) 70% Isopropyl alcohol 
B) Iodophor 
C) Chlorine bleach 
D) Hydrogen peroxide

Exam 8: Control of Microorganisms in the Environment

Which of the following is a function of pasteurization?

An experiment was done to determine the decimal reduction time of a specific population of organisms at 80oC.The data is indicated by an arrow on the graph.Which labeled line represents the likely results if the experiment was repeated using a lower temperature?

Because filtration removes rather than destroys microorganisms,it does not truly sterilize the materials passing through the filter.

Which of the following would be most appropriate for removal of bacteria and viruses from a liquid?

Which of these is an agent that is used to sterilize the plastic tubing of heart-lung machines?

Disinfectants are generally regulated by the

Joseph Lister

Which of the following would be most effective and practical for routine home disinfection of a kitchen sponge between uses?

The Evolution of Microorganisms and Microbiology

Microscopy

Bacterial Cell Structure

Archaeal Cell Structure

Eukaryotic Cell Structure

Viruses and Other Acellular Infectious Agents

Microbial Growth

Antimicrobial Chemotherapy

Introduction to Metabolism

Catabolism: Energy Release and Conservation

Anabolism: the Use of Energy in Biosynthesis

Bacterial Genome Replication and Expression

Regulation of Bacterial Cellular Processes

Eukaryotic and Archaeal Genome Replication and Expression

Mechanisms of Genetic Variation

Recombinant DNA Technology

Microbial Genomics

Microbial Taxonomy and the Evolution of Diversity

Archaea

The Deinococci, Mollicutes, and Nonproteobacterial Gram-Negative Bacteria

The Proteobacteria

Firmicutes: The Low G-C Gram-Positive Bacteria

Actinobacteria: the High G-C Gram-Positive Bacteria

Protists

Fungi Eumycota

Viruses

Biogeochemical Cycling and Global Climate Change

Methods in Microbial Ecology

Microorganisms in Marine and Freshwater Ecosystems

Microorganisms in Terrestrial Ecosystems

Microbial Interactions

Innate Host Resistance

Adaptive Immunity

Pathogenicity and Infection

Clinical Microbiology and Immunology

Epidemiology and Public Health Microbiology

Human Diseases Caused by Viruses and Prions

Human Diseases Caused by Bacteria

Human Diseases Caused by Fungi and Protists

Microbiology of Food

Biotechnology and Industrial Microbiology

Applied Environmental Microbiology

Filters

An experiment was done to determine the decimal reduction time of a specific population of organisms at 80^oC.The data is indicated by an arrow on the graph.Which labeled line represents the likely results if the experiment was repeated using a lower temperature?