Microbiology Fundamentals: A Clinical Approach
3rd Edition
ISBN: 9781259709227
Author: Marjorie Kelly Cowan Professor, Heidi Smith
Publisher: McGraw-Hill Education
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Chapter 5, Problem 14Q
Summary Introduction
To determine:
The stages in the viral life cycle which could have led to change of RNA into DNA for contribution to cellular
Concept introduction:
Viruses are microscopic infectious
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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.
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Multiple Choice
The virus carries genes that will interfere with host cell activities.
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The integration could disrupt an essential gene or genes.
Chapter 5 Solutions
Microbiology Fundamentals: A Clinical Approach
Ch. 5.1 - Explain what it means when viruses are described...Ch. 5.1 - Identify better terms for viruses than alive or...Ch. 5.1 - Which statements are accurate regarding properties...Ch. 5.2 - Prob. 3AYPCh. 5.2 - Describe the function and structure(s) of viral...Ch. 5.2 - Distinguish between enveloped and naked viruses.Ch. 5.2 - Prob. 6AYPCh. 5.2 - Diagram the possible nucleic acid configurations...Ch. 5.2 - Medical Moment Q. Antibiotics targeting bacteria...Ch. 5.3 - Diagram the five-step life cycle of animal...
Ch. 5.3 - Define the term cytopathic effect and provide one...Ch. 5.3 - Discuss both persistent and transforming...Ch. 5.3 - Provide thorough descriptions of both lysogenic...Ch. 5.3 - Prob. 2NPCh. 5.3 - Prob. 3NPCh. 5.4 - List the three principal purposes of cultivating...Ch. 5.4 - Describe three ways in which viruses are...Ch. 5.4 - Prob. 4NPCh. 5.5 - Prob. 14AYPCh. 5.5 - Prob. 2MMCh. 5.5 - Prob. 5NPCh. 5.6 - Analyze the relative importance of viruses in...Ch. 5.6 - Discuss the primary reason that antiviral drugs...Ch. 5 - ___% of human DNA is thought to consist of viral...Ch. 5 - Prob. 2QCh. 5 - Construct a scenario in which viral latency and...Ch. 5 - Prob. 4QCh. 5 - If viruses that normally form envelopes were...Ch. 5 - Viruses use the host cell cytoplasmic space as...Ch. 5 - The general steps in a viral multiplication cycle...Ch. 5 - Compare and contrast the processes of latency and...Ch. 5 - Pathogenic bacteria lysogenized by phages can...Ch. 5 - When phage nucleic acid is incorporated into the...Ch. 5 - Prob. 11QCh. 5 - Prob. 12QCh. 5 - Prob. 13QCh. 5 - Prob. 14QCh. 5 - Prob. 15QCh. 5 - Prob. 16QCh. 5 - Prob. 17QCh. 5 - Construct an argument for whether humans or...Ch. 5 - Since 2000, the number of orders of viruses...Ch. 5 - Prob. 20QCh. 5 - Prob. 21QCh. 5 - Prob. 1VC
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- Identify the numbered steps of this viral life cycle/replication cycle depicted here.arrow_forwardViruses cannot reproduce on their own, without the help of a living cell. Explain the basics of how viruses make more viruses.arrow_forwardViruses are said to be “obligate intracellular parasites.” What does this mean with respect to how new viruses are made?arrow_forward
- List three differences between the structure of HIV and the virus that causes influenza. For one of these differences, explain how the STRUCTURE is key to the FUNCTION of the virus.arrow_forwardWhy are virus genomes small?arrow_forwardWhat similarities do a virus and non living object share?arrow_forward
- How do cellular receptors for viruses come about? does host species that a particular virus infects evolve to have the viral receptors? would the above offer any survival and/or reproductive advantages to the host? how likely does the virus mutate so it would recognize (or fit) a particular exiting surface protein on the target cells of the host?arrow_forwardViruses are made up of the same biomolecules as cellular organisms (DNA, RNA, proteins, lipids, etc.), which are synthesized through enzymatic dehydration reactions from building blocks and disassembled by enzymatic hydrolysis. They infect cells and replicate themselves using resources from the host cells. Scientists discovered a previously unknown strain of virus in the tropical Pacific Ocean and it can infect higher-order eukaryotes. Initial analysis revealed that the virus is mainly composed of nucleic acids, proteins, and lipids. Chemical analysis after complete hydrolysis revealed the following building blocks (by weight): Chemical components Nucleosides Amino acids Lipids, phosphates, and carbohydrates Percentage by weight 20 30 50 Analysis of percentages of nucleosides yielded the following results (by molar ratio): Nucleosides A G T C U Percentage by mole 19 29 19 29 4 Which of the following events mostly involves hydrolysis reaction after the virus infects…arrow_forwardwe can stop the biosynthesis stage of the viral life cycle (not the stages before it) by preventing/inhibiting: A) fusion of the envelope and the plasma membrane B) replication and expression of viral nucleic acid/genome C) the virus's attachment molecules from binding to the host cell receptor D) new copies of viral nucleic acid from combining with newly made viral proteins E)buddingarrow_forward
- Why do the two types of viruses differ if each has plus configuration single stranded RNA as its genome?arrow_forwardCoronaviruses have a positive-sense single stranded RNA genome. a.) What is the genome replication strategy of this category of viruses? b.) How do you think this feature affects the stability of the viral genome? (hint use figure below) Mutation rates in different types of viruses. Estimates obtained for viruses belonging to the major indicated groups are shown as a function of genome size. This reveals an effect of genetic material (RNA/DNA) and genome size on viral mutation rates.arrow_forwardImagine that a researcher discovers a new type of virus. This virus contains single‑stranded RNA with "negative" sense. Consider the image. Which statement is true regarding this virus? According to the Baltimore system, this virus would be classified as a type V virus. Based on the presence of single‑stranded RNA, this virus is likely similar to HIV. According to the Baltimore system, this virus would be classified as a type IV virus. This virus must use reverse transcriptase to produce mRNA.arrow_forward
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