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
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
Verified step by step guidance1
Step 1: Understand the role of microorganisms in various ecological and industrial processes. Microorganisms can have both beneficial and harmful effects, so identifying beneficial activities is key.
Step 2: Analyze option (a): Some microorganisms are used as food for humans. For example, certain algae and fungi are consumed directly or used in food production, which is a beneficial activity.
Step 3: Analyze option (b): Some microorganisms use carbon dioxide. This refers to photosynthetic microorganisms like cyanobacteria that fix carbon dioxide, contributing to the carbon cycle, which is beneficial.
Step 4: Analyze option (c): Some microorganisms provide nitrogen for plant growth. This involves nitrogen-fixing bacteria that convert atmospheric nitrogen into forms plants can use, a crucial beneficial process.
Step 5: Analyze option (d): Some microorganisms are used in sewage treatment processes. Microbes break down organic waste in sewage, helping to clean water, which is another beneficial activity. Since all these are beneficial, option (e) 'all of the above' is the comprehensive correct choice.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Microorganisms as a Food Source
Certain microorganisms, such as algae and fungi, serve as direct or indirect food sources for humans. For example, edible algae like spirulina are consumed as nutritional supplements, and yeast is used in baking and brewing, highlighting their beneficial role in human diets.
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Commercial Benefits of Microorganisms
Microbial Role in Carbon and Nitrogen Cycles
Microorganisms play essential roles in global biogeochemical cycles by utilizing carbon dioxide during photosynthesis or other metabolic processes and fixing atmospheric nitrogen into forms usable by plants. This supports ecosystem productivity and plant growth.
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Microorganisms in Environmental Biotechnology
Microorganisms are employed in sewage treatment to break down organic waste and pollutants, helping to purify water and reduce environmental contamination. This beneficial activity demonstrates their importance in waste management and environmental sustainability.
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Related Practice
Textbook Question
Match the microorganisms in column A to their descriptions in column B.
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Textbook Question
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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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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