Microbiology: A Systems Approach
Microbiology: A Systems Approach
5th Edition
ISBN: 9781259706615
Author: Marjorie Kelly Cowan Professor
Publisher: McGraw-Hill Education
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Chapter 25, Problem 1MCQ

Drinking water utilities monitor their production system for the occurrence of

  1. a. methanogens.
  2. b. coliform bacteria.
  3. c. nematodes.
  4. d. yeasts.
Expert Solution & Answer
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Summary Introduction

Introduction:

Indicator organism serves as an indicator for the presence of another organism in a system. In water, indicator organism is used to detect other disease-causing pathogens and bacteria which have a high potential for health hazards.

Answer to Problem 1MCQ

Correct answer:

Drinking water utilities monitor their production system for the occurrence of coliform bacteria. Therefore, option (b) is correct.

Option (b) is given as “coliform bacteria”.

Explanation of Solution

Justify the reason for the correct statement:

Indicator organisms are used to test the water quality. Their presence notifies the possible contamination of the pathogen in water; the presence of coliforms and E.coli specify the fecal and sewage contamination and it also indicates the presence of a pathogen in water. Coliforms and E. coli presence works as an indicator organism in contaminated water.

Hence, option (b) is correct.

Justify the reasons for the incorrect statements:

Option (a) is given as “methanogens”.

Methanogens are used to break down the organic pollutant from the water. They are used in the production of methane. Hence, it is a wrong answer.

Option (c) is given as “nematodes”.

Nematodes are used to remove fecal bacteria from contaminated water. Hence, it is a wrong answer.

Option (d) is given as “yeast”.

Yeast is used to treating the water contaminated with a starch such as vermicelli water. Hence, it is a wrong answer.

Hence, options (a), (c), and (d) are incorrect.

Conclusion

The presence of indicator organism in contaminated water identifies the presence of other disease-causing pathogens.

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Chapter 25 Solutions

Microbiology: A Systems Approach

Ch. 25.3 - Summarize the microbial process that leads to...Ch. 25.3 - Write the equation showing how yeasts convert...Ch. 25.3 - Discuss how microorganisms themselves are useful...Ch. 25.3 - Provide background on current HACCP guidelines,...Ch. 25.3 - Prob. 15AYPCh. 25.3 - Outline basic principles of using temperature to...Ch. 25.3 - List methods other than temperature currently used...Ch. 25.4 - Prob. 18AYPCh. 25.4 - Distinguish between primary and secondary...Ch. 25.4 - List the four steps of industrial product...Ch. 25.4 - Identify five industrial products made by...Ch. 25 - Drinking water utilities monitor their production...Ch. 25 - Milk is usually pasteurized by a. the...Ch. 25 - During sewage treatment, microbial action on a...Ch. 25 - Which of the following is unlikely to be a...Ch. 25 - The bloom in wine making refers to a. the...Ch. 25 - When algae produce biofuels, what is the other...Ch. 25 - Secondary metabolites of microbes are formed...Ch. 25 - In industrial fermentation, which step precedes...Ch. 25 - Which of the following is currently being produced...Ch. 25 - In biotechnology, fermentation refers to a. the...Ch. 25 - Prob. 11TFCh. 25 - Food products should always be kept completely...Ch. 25 - Alcoholic beverages are produced by the...Ch. 25 - Nutritional yeast is consumed by humans to...Ch. 25 - Refrigerating food prevents the growth of all...Ch. 25 - a.Summarize one beneficial use of sludge today,...Ch. 25 - Every year, supposedly safe municipal water...Ch. 25 - Provide evidence in support of or refuting the...Ch. 25 - a.List examples of microbes used in the production...Ch. 25 - Further investigate the HACCP system, and...Ch. 25 - From chapter 3, figure 3.5b. If this MacConkey...Ch. 25 - From chapter 8. During which portion of metabolism...Ch. 25 - Using the words that follow, please create a...
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