Textbook Question
The ability of a virus to infect an organism is regulated by
a. the host species.
b. the type of cells.
c. the availability of an attachment site.
d. cell factors necessary for viral replication.
e. all of the above
Ch. 13 - Viruses, Viroids, and Prions
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 13, Problem 5
An example of lysogeny in animals could be
a. slow viral infections.
b. latent viral infections.
c. T-even bacteriophages.
d. infections resulting in cell death.
e. none of the above
Verified step by step guidance1
Understand the concept of lysogeny: Lysogeny is a process where a bacteriophage integrates its genome into the host bacterial DNA and remains dormant without causing immediate lysis of the host cell.
Recognize that lysogeny primarily occurs in bacteria and bacteriophages, not typically in animal viruses, but a similar concept in animals is latent viral infections where the virus remains dormant within host cells.
Analyze each option: (a) slow viral infections involve gradual disease progression but are not necessarily lysogenic; (b) latent viral infections involve dormancy of the virus within animal cells, resembling lysogeny; (c) T-even bacteriophages are bacteriophages that infect bacteria, not animals; (d) infections resulting in cell death are lytic, not lysogenic; (e) none of the above is a fallback if none fit.
Identify that the best analogy to lysogeny in animals is latent viral infections, where the virus remains inactive within the host cells and can reactivate later.
Conclude that the correct answer corresponds to option (b) latent viral infections, as it best represents lysogeny-like behavior in animals.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Lysogeny
Lysogeny is a viral life cycle where the viral genome integrates into the host's DNA and remains dormant without causing immediate harm. This state can persist until certain conditions trigger the virus to enter the lytic cycle, leading to active replication and cell destruction.
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03:37
Lysogenic Conversion
Latent Viral Infections
Latent viral infections occur when viruses remain inactive within host cells for extended periods, similar to lysogeny. The virus does not produce symptoms during latency but can reactivate later, causing disease. This is common in animal viruses like herpesviruses.
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05:12Persistent Viral Infections
T-even Bacteriophages
T-even bacteriophages are viruses that infect bacteria and typically follow a lytic cycle, causing rapid host cell lysis. They do not undergo lysogeny, making them distinct from temperate phages that integrate into host genomes.
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04:34Lytic & Lysogenic Bacteriophages
Related Practice
Textbook Question
Compare biosynthesis of a + stranded RNA and a - stranded RNA virus.
Textbook Question
Recall from Chapter 1 that Koch's postulates are used to determine the etiology of a
disease. Why is it difficult to determine the etiology of
a. a viral infection, such as influenza?
b. cancer?
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Textbook Question
Which of the following would be the first step in the biosynthesis of a virus with reverse transcriptase?
a. A complementary strand of RNA must be synthesized.
b. Double-stranded RNA must be synthesized.
c. A complementary strand of DNA must be synthesized from an RNA template.
d. A complementary strand of DNA must be synthesized from a DNA template.
e. None of the above
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Textbook Question
Label the principal events of attachment, biosynthesis, entry, and maturation of a + stranded RNA virus. Draw in uncoating.
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Textbook Question
Some antibiotics activate phage genes. MRSA releasing Panton-Valentine leukocidin is a toxin that can cause a life-threatening disease. Why can such a disease develop following antibiotic treatment?
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