Foundations in Microbiology
10th Edition
ISBN: 9781259705212
Author: Kathleen Park Talaro, Barry Chess Instructor
Publisher: McGraw-Hill Education
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Chapter 6.L2, Problem 6CT
Is there such a thing as a “good virus�? Explain why or why not. Consider both bacteriophages and viruses of eukaryotic organisms.
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Several negative-strand viruses carry their genomeas a set of discrete RNA segments. Examples include influ-enza virus (eight segments), Rift Valley fever virus (threesegments), Hantavirus (three segments), and Lassa virus(two segments), to name a few. Why does segmentation ofthe genome provide a strong evolutionary advantage forthese viruses?
Is there such a thing as a “good virus”? Explain why or why not. Considerboth bacteriophages and viruses of eukaryotic organisms.
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Chapter 6 Solutions
Foundations in Microbiology
Ch. 6.1 - Indicate how viruses were discovered and...Ch. 6.1 - Describe the unique characteristics of viruses.Ch. 6.1 - Discuss the origin and importance of viruses.Ch. 6.1 - Prob. 1CYPCh. 6.1 - Prob. 2CYPCh. 6.1 - Explain what it means to be an obligate...Ch. 6.1 - Prob. 4CYPCh. 6.2 - Prob. 4ELOCh. 6.2 - Distinguish among types of capsids and...Ch. 6.2 - Prob. 6ELO
Ch. 6.2 - Prob. 7ELOCh. 6.2 - Summarize the different viral groups based on...Ch. 6.3 - Prob. 9ELOCh. 6.3 - Indicate the characteristics used in identifying...Ch. 6.3 - Prob. 5CYPCh. 6.3 - Describe the general structure of viruses.Ch. 6.3 - Prob. 7CYPCh. 6.3 - Prob. 8CYPCh. 6.3 - Prob. 9CYPCh. 6.3 - Prob. 10CYPCh. 6.3 - How are the poxviruses different from other animal...Ch. 6.3 - Prob. 12CYPCh. 6.3 - How are generic and common names used?Ch. 6.4 - Describe the virus-host relationship.Ch. 6.4 - Prob. 12ELOCh. 6.4 - Prob. 13ELOCh. 6.4 - Prob. 14ELOCh. 6.4 - Explain two ways in which animal viruses are...Ch. 6.4 - Prob. 16ELOCh. 6.4 - Write a narrative that describes the stages in the...Ch. 6.4 - Prob. 15CYPCh. 6.4 - Summarise the two major ways in which animal...Ch. 6.4 - Prob. 17CYPCh. 6.4 - Describe several cytopathic effects of viruses....Ch. 6.4 - Explain what it means for a virus to become...Ch. 6.4 - Prob. 20CYPCh. 6.5 - Prob. 17ELOCh. 6.5 - Explain what is meant by lysogeny, prophage,...Ch. 6.5 - Prob. 19ELOCh. 6.5 - In simple terms, what does the viral nucleic acid...Ch. 6.5 - What processes are involved in bacteriophage...Ch. 6.5 - Prob. 23CYPCh. 6.5 - Compare and contrast the main phases in the lytic...Ch. 6.5 - why is penetration so different between the two...Ch. 6.6 - Prob. 20ELOCh. 6.6 - Compare the methods and uses of cell culture, bird...Ch. 6.7 - Prob. 22ELOCh. 6.7 - Prob. 23ELOCh. 6.7 - Describe the three main techniques for cultivating...Ch. 6.7 - Prob. 27CYPCh. 6.7 - What are cell lines and monolayers, and how are...Ch. 6.7 - Prob. 29CYPCh. 6.8 - Prob. 24ELOCh. 6.8 - Prob. 25ELOCh. 6.8 - Prob. 30CYPCh. 6.8 - Prob. 31CYPCh. 6.L1 - Prob. 1MCQCh. 6.L1 - Prob. 2MCQCh. 6.L1 - The capsid is composed of protein subunits called...Ch. 6.L1 - Prob. 4MCQCh. 6.L1 - Prob. 5MCQCh. 6.L1 - Prob. 6MCQCh. 6.L1 - A prophage is a/an ____ stage in the cycle of...Ch. 6.L1 - Prob. 8MCQCh. 6.L1 - Prob. 9MCQCh. 6.L1 - Prob. 10MCQCh. 6.L1 - Prob. 11MCQCh. 6.L1 - Prob. 12MCQCh. 6.L1 - Prob. 13MCQCh. 6.L1 - Prob. 14MCQCh. 6.L1 - Prob. 15MCQCh. 6.L1 - Prob. 1CSRCh. 6.L1 - Prob. 2CSRCh. 6.L1 - Prob. 3CSRCh. 6.L1 - a. What characteristics of viruses could be used...Ch. 6.L1 - Prob. 2WCCh. 6.L1 - a. Since viruses lack metabolic enzymes, how can...Ch. 6.L1 - Prob. 4WCCh. 6.L2 - Prob. 1CTCh. 6.L2 - Prob. 2CTCh. 6.L2 - Prob. 3CTCh. 6.L2 - a. Given that DNA viruses can be carried in the...Ch. 6.L2 - Prob. 5CTCh. 6.L2 - Is there such a thing as a “good virus�?...Ch. 6.L2 - Prob. 7CTCh. 6.L2 - Prob. 8CTCh. 6.L2 - Prob. 9CTCh. 6.L2 - Label the parts of viruses in figures...Ch. 6.L2 - How would you describe the kind of capsid found on...
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- There have been recurring cases of mad-cow disease in the United Kingdom since the mid-1990s. Mad-cow disease is caused by a prion, an infectious particle that consists only of protein. In 1986, the media began reporting that cows all over England were dying from a mysterious disease. Initially, there was little interest in determining whether humans could be affected. For 10 years, the British government maintained that this unusual disease could not be transmitted to humans. However, in March 1996, the government did an about-face and announced that bovine spongiform encephalopathy (BSE), commonly known as mad-cow disease, can be transmitted to humans, where it is known as variant Creutzfeldt-Jakob disease (VCJD). As in cows, this disease eats away at the nervous system, destroying the brain and essentially turning it into a spongelike structure filled with holes. Victims experience dementia; confusion; loss of speech, sight, and hearing; convulsions; coma; and finally death. Prion diseases are always fatal, and there is no treatment. Precautionary measures taken in Britain to prevent this disease in humans may have begun too late. Many of the victims contracted it over a decade earlier, when the BSE epidemic began, and the incubation period is long (VCJD has an incubation period of 10 to 40 years). A recent study concluded that 1 in 2,000 people in Great Britain carry the abnormally folded protein that causes VCJD. In spite of these numbers, the death rate from VCJD remains low. It is not clear whether this means that the incubation period for the disease is much longer than previously thought, or whether they may never develop the disease. How can a prion replicate itself without genetic material?arrow_forwardAs a general rule, viruses are not considered to be alive based on several reasons. One such reason is that some viruses use RNA as their genetic material instead of DNA. Which of the five biological themes does this violate? Briefly explain why.arrow_forwardMake an outline about Virus genus involving difference in host range, serologic reactions as sequences of protein, and degree of NA homology. Include a thorough explanation for all of it.arrow_forward
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- All of the following statements correctly describes the properties of Influenza A virus EXCEPT A-Viral transcription occurs in the nucleus B-Mature virion are released by budding C-Single stranded positive sense RNA virus D-Attaches to cell-surface sialic acidarrow_forwardViruses that infect bacterial cells do not infect human cells, and viruses that infect human cells do not infect bacterial cells. Explain why this should be the case.arrow_forwardThe relative amounts of each nitrogenous base are tabulated here for four different viruses. For each virus listed in the following table, indicate whether its genetic material is DNA or RNA and whether it is single stranded or double stranded. Explain your reasoning. Virus T C U G A I 0 12 9 12 9 II 23 16 0 16 23 III 34 42 0 18 39 IV 0 24 35 27 17arrow_forward
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