Biology
11th Edition
ISBN: 9781259188138
Author: Peter H Raven, George B Johnson Professor, Kenneth A. Mason Dr. Ph.D., Jonathan Losos Dr., Susan Singer
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 27, Problem 2S
Most biologists believe that viruses evolved following the origin of the first cells. Defend or critique this concept.
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Chapter 27 Solutions
Biology
Ch. 27 - The reverse transcriptase enzyme is active in...Ch. 27 - Which of the following is NOT part of a virus? a....Ch. 27 - Which of the following is common in animal viruses...Ch. 27 - Which of the following would NOT be part of the...Ch. 27 - A process by which a virus may change a benign...Ch. 27 - Prob. 6UCh. 27 - Prob. 7UCh. 27 - Prob. 1ACh. 27 - The idea of a protein that was an infectious agent...Ch. 27 - Bacterial viruses and animal viruses are similar...
Ch. 27 - Prob. 4ACh. 27 - Phage conversion in which viruses add genes to a...Ch. 27 - According to the prion hypothesis, the infectious...Ch. 27 - Prob. 7ACh. 27 - Prob. 8ACh. 27 - E. coli lysogens derived from infection by phage ...Ch. 27 - Most biologists believe that viruses evolved...Ch. 27 - Prob. 3SCh. 27 - What do we mean by the term emerging virus? How is...Ch. 27 - How might phage be used to transfer E. coli genes...
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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
- . According to origin-of-life scenarios proposed by William Martin, Michael Russell, and Theodor Diener, the first self-replicating genetic molecules were most similar to: double-stranded RNA viruses single-stranded RNA virusoids single-stranded DNA viruses double-stranded DNA viruses single-stranded RNA viroidsarrow_forwardChoose the correct the correct answer Viral particicles contain both nucleic acid and protein and can replicate inside of a host cell. Technically, this constitutes a "self -replicating molecular assemblage" which is also one way to define life. Therefore, one can conclude that a. Viruses are not living because they don't breathe oxygen b.Viruses are living c.Viruses are not living because they cannot think d. Viruses are not living because this formationis a simple repetitive process without the ability to respond to the environmentarrow_forwardExplain why the discovery of retroviruses is important to the field of molecular biologyarrow_forward
- Viruses are not found in the tree of life. Why do you think so?arrow_forwardWhy is it a strong evolutionary hypothesis that although viruses are the structurally simplest beings they were not the first living beings?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
- One advantage of using bacteria and viruses for genetic study is the fact that they have haploid genomes. Explain why a haploid genome facilitates genetic analysisarrow_forwardA new virus has recently been discovered that infects human lymphocytes. The virus can be grown in the laboratory using cultured lymphocytes as host cells. Design an experiment using a radioactive label that would tell you if the virus contains DNA or RNA genome.arrow_forwardBased on devolution or the regressive hypothesis, it proposes to explain the origin of viruses by suggesting that they evolved from free-living cells. a. True b. Falsearrow_forward
- What is the basic classification of viruses. In other words, if you find a new virus, what is the first thing to determine? A. Is this a DNA or an RNA virus? B. Does it cause blue snotty nosed fever? C. does it have a vector? D. does it infect humans?arrow_forwardSelect all the following statements that are TRUE regarding viruses: □ All viruses are potentially dangerous to humans because any virus can infect any host. □ Viruses are fastidious pathogens that require complex growth media. □ Viruses are noncellular particles that take over the metabolism of a cell to generate more virus particles. □ Viruses are genomes made of RNA and DNA that lack many protein. □ Viruses can infect all other known life forms on earth, from Archaea to humans.arrow_forwardWhat is an emerging virus? Give two examples. Propose an experiment to explain how an emerging virus could arise.arrow_forward
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