Textbook Question
What type of microorganism has a peptidoglycan cell wall, has DNA that is not contained in a nucleus, and has flagella?
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Ch. 1 - The Microbial World and You
Tortora14th EditionMicrobiology: An IntroductionISBN: 9780138200398
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Table of contents
- Ch. 1 - The Microbial World and You18
- Ch. 2 - Chemical Principles20
- Ch. 3 - Observing Microorganisms Through a Microscope18
- Ch. 4 - Functional Anatomy of Prokaryotic and Eukaryotic Cells21
- Ch. 5 - Microbial Metabolism20
- Ch. 6 - Microbial Growth20
- Ch. 7 - The Control of Microbial Growth20
- Ch. 8 - Microbial Genetics19
- Ch. 9 - Biotechnology & DNA Technology20
- Ch. 10 - Classification of Microorganisms15
- Ch. 11 - The Prokaryotes: Domains Bacteria and Archaea14
- Ch. 12 - The Eukaryotes: Fungi, Algae, Protozoa, and Helminths17
- Ch. 13 - Viruses, Viroids, and Prions20
- Ch. 14 - Principles of Disease and Epidemiology21
- Ch. 15 - Microbial Mechanisms of Pathogenicity19
- Ch. 16 - Innate Immunity: Nonspecific Defenses of the Host20
- Ch. 17 - Adaptive Immunity: Specific Defenses of the Host20
- Ch. 18 - Practical Applications of Immunology20
- Ch. 19 - Disorders Associated with the Immune System19
- Ch. 20 - Antimicrobial Drugs19
- Ch. 21 - Microbial Diseases of the Skin and Eyes21
- Ch. 22 - Microbial Diseases of the Nervous System19
- Ch. 23 - Microbial Diseases of the Cardiovascular and Lymphatic Systems20
- Ch. 24 - Microbial Diseases of the Respiratory System20
- Ch. 25 - Microbial Diseases of the Digestive System20
- Ch. 26 - Microbial Diseases of the Urinary and Reproductive Systems19
- Ch. 27 - Environmental Microbiology20
- Ch. 28 - Applied and Industrial Microbiology19
Tortora14th EditionMicrobiology: An IntroductionISBN: 9780138200398Not the one you use?Change textbook
Chapter 1, Problem 6
It is possible to purchase the following microorganisms in a retail store. Provide a reason for buying each.
a. Bacillus thuringiensis
b. Saccharomyces
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Identify the common uses of Bacillus thuringiensis (Bt) in practical applications. Bt is a bacterium widely used as a biological pesticide because it produces toxins harmful to certain insect larvae but safe for humans and other animals.
Explain why someone might buy Bacillus thuringiensis: it is typically purchased to control pest populations in agriculture or gardening without using chemical pesticides, making it an environmentally friendly option.
Identify the common uses of Saccharomyces, which is a genus of yeast. The most well-known species, Saccharomyces cerevisiae, is used in baking, brewing, and fermentation processes.
Explain why someone might buy Saccharomyces: it is often purchased to ferment sugars into alcohol in brewing beer or wine, or to help dough rise in baking by producing carbon dioxide.
Summarize that the reasons for buying these microorganisms relate to their beneficial roles: Bacillus thuringiensis for biological pest control, and Saccharomyces for fermentation in food and beverage production.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Bacillus thuringiensis as a Biopesticide
Bacillus thuringiensis (Bt) is a bacterium used as a natural insecticide. It produces toxins harmful to specific insect larvae, making it a popular choice for pest control in agriculture and gardening without harmful chemicals.
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03:56
Bacilli Bacterial Cell Arrangements
Saccharomyces in Fermentation
Saccharomyces, especially Saccharomyces cerevisiae, is a yeast widely used in baking and brewing. It ferments sugars to produce carbon dioxide and alcohol, essential for bread rising and alcoholic beverage production.
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02:02Alcohol Fermentation
Commercial Availability of Microorganisms
Certain microorganisms are sold commercially due to their beneficial applications in agriculture, food production, and biotechnology. Understanding their uses helps consumers select microbes for specific practical purposes.
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03:17Commercial Benefits of Microorganisms
Related Practice
Textbook Question
Which of the following is a beneficial activity of microorganisms?
a. Some microorganisms are used as food for humans.
b. Some microorganisms use carbon dioxide.
c. Some microorganisms provide nitrogen for plant growth.
d. Some microorganisms are used in sewage treatment processes.
e. all of the above
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Textbook Question
Match the people in column A to their contribution toward the advancement of microbiology, in column B.
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Textbook Question
Which of the following statements is the best definition of biogenesis?
a. Nonliving matter gives rise to living organisms.
b. Living cells can only arise from preexisting cells.
c. A vital force is necessary for life.
d. Air is necessary for living organisms.
e. Microorganisms can be generated from nonliving matter.
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Textbook Question
It has been said that bacteria are essential for the existence of life on Earth. Which of the following is the essential function performed by bacteria?
a. Control insect populations
b. Directly provide food for humans
c. Decompose organic material and recycle elements
d. Cause disease
e. Produce human hormones such as insulin
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Textbook Question
Which of the following is an example of bioremediation?
a. Application of oil-degrading bacteria to an oil spill
b. Application of bacteria to a crop to prevent frost damage
c. Fixation of gaseous nitrogen into usable nitrogen
d. Production by bacteria of a human protein such as interferon
e. All of the above
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