Microbiology: An Introduction
12th Edition
ISBN: 9780321929150
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: PEARSON
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Textbook Question
Chapter 13, Problem 1A
Discuss the arguments for and against the classification of viruses as living organisms.
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Discuss the following statement: “Viruses exist in the twilight zone of life: outside cells they are simply dead assemblies of molecules; inside cells, however, they are alive.”
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Chapter 13 Solutions
Microbiology: An Introduction
Ch. 13 - Why do we classify viruses as obligatory...Ch. 13 - List the four properties that define a virus, what...Ch. 13 - Describe the four morphological classes of...Ch. 13 - DRAW IT Label the principal events of attachment,...Ch. 13 - Compare biosynthesis of a + stranded RNA and a ...Ch. 13 - Prob. 6RCh. 13 - Why is it difficult to determine the etiology of a...Ch. 13 - Prob. 8RCh. 13 - Plant viruses can be cultured in (c) __________.Ch. 13 - NAME IT Identify the viral family that infects...
Ch. 13 - Prob. 1MCQCh. 13 - The molecule serving as mRNA can be incorporated...Ch. 13 - Prob. 3MCQCh. 13 - Prob. 4MCQCh. 13 - An example of lysogeny in animals could be a. slow...Ch. 13 - The ability of a virus to infect an organism is...Ch. 13 - Which of the following statements is false? a....Ch. 13 - Prob. 8MCQCh. 13 - Prob. 9MCQCh. 13 - Prob. 10MCQCh. 13 - Discuss the arguments for and against the...Ch. 13 - In some viruses, capsomeres function as enzymes as...Ch. 13 - Why was the discovery of simian AIDS and feline...Ch. 13 - Prophages and proviruses have been described as...Ch. 13 - Prob. 1CAECh. 13 - A newborn female developed extensive vesicular and...Ch. 13 - Prob. 3CAE
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- As 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_forwardAre viruses generally considered living or nonliving? Explain.arrow_forwardThere are three hypotheses about the origin of viruses. Briefly describe each hypothesis.arrow_forward
- Discuss the properties of emerging viruses. What are the challengesassociated with combating them?arrow_forwardExplain one structural distinction between viruses and cells.arrow_forwardMany viruses have the ability to resurrect dead cells. Why would investigating this feature of viruses be relevantarrow_forward
- briefly explain the situation below. Larger viruses usually have a double-stranded genome, whereas small viruses typically have a single-stranded genome. What reasonable explanation can you offer for this observation?arrow_forwardViruses are not considered living entities, despite the fact that they evolve, have genetic information, and are connected to living organisms. What characteristics of living organisms do viruses lack? Give a brief explanation of how viruses lack these aspects.arrow_forwardSummarize arguments on both sides of the debate regarding the classification of viruses as living organismsarrow_forward
- Name any three viruses which have RNA as a genetic material?arrow_forwardClassification of viruses is based on all of the following excepta) type of nucleic acid. b) shape of virus.c) size of virus. d) host infected.e) strandedness of nucleic acid.arrow_forwardResearchers have recently discovered giant viruses that are 1 μm in length, the same size as some bacterial cells. The genomes of these viruses contain over 2 million base pairs of DNA, which is more DNA than is found in many bacterial genomes, and their genomes contain hundreds—in some cases, thousands—of genes. Given these observations and what you know about viruses, should viruses be considered living or nonliving? Give arguments for and against considering viruses as living organisms.arrow_forward
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