Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 21, Problem 23CTQ
Varicella-zoster virus is a double-stranded DNA virus that causes chickenpox. How does its genome structure provide an evolutionary advantage over a single-stranded DNA virus?
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Why is it a strong evolutionary hypothesis that although viruses are the structurally simplest beings they were not the first living beings?
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Chapter 21 Solutions
Biology 2e
Ch. 21 - Figure 21.5 Which of the following statements...Ch. 21 - Figure 21.8 Influenza virus is packaged in a viral...Ch. 21 - Figure 21.10 Which of the following statements is...Ch. 21 - Which statement is true? A virion contains DNA and...Ch. 21 - The viral______play(s) a role in attaching a...Ch. 21 - Viruses. all have a round shape cannot have a long...Ch. 21 - The observation that the bacteria genus Chlamydia...Ch. 21 - A scientist discovers a new virus with a linear,...Ch. 21 - Which statement is not true of viral replication?...Ch. 21 - Which statement is true of viral replication? In...
Ch. 21 - Which statement is true of reverse transcriptase?...Ch. 21 - Oncogenic virus cores can be. RNA DNA neither RNA...Ch. 21 - Which is true of DNA viruses? They use the host...Ch. 21 - A bacteriophage can infect the lungs viruses...Ch. 21 - People with the CCR5?32 mutation of a T-cell...Ch. 21 - An apple grower notices that several of his apple...Ch. 21 - Which of the following is NOT used to treat active...Ch. 21 - Vaccines. are similar to viroids are only needed...Ch. 21 - A patient presents at the clinic with an acute...Ch. 21 - Which of the following is not associated with...Ch. 21 - Which statement is true of viroids? They are...Ch. 21 - The first electron micrograph of a virus (tobacco...Ch. 21 - Varicella-zoster virus is a double-stranded DNA...Ch. 21 - Classify the Rabies virus (a rhabdovirus family...Ch. 21 - Why can’t dogs catch the measles?Ch. 21 - One of the first and most important targets for...Ch. 21 - In this section, you were introduced to different...Ch. 21 - Although plant viruses cannot infect humans, what...Ch. 21 - A bacteriophage with a lytic life cycle develops a...Ch. 21 - Why is immunization after being bitten by a rabid...Ch. 21 - The vaccine Gardasil that targets human papilloma...Ch. 21 - Prions are responsible for variant Creutzfeldt...Ch. 21 - How are viroids like viruses?Ch. 21 - A botanist notices that a tomato plant looks...
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- Why are virus genomes small?arrow_forwardWhy do the two types of viruses differ if each has plus configuration single stranded RNA as its genome?arrow_forwardAfter a positive strand RNA virus ( Such as Coronaviruses) enters the host cell, the RNA is translated by ribosomes to create proteins associated with the virus (Such as, for example, the surface antigens like E and Spike proteins). How then, would the genetic material itself be replicated to be incorporated into the new viruses?.arrow_forward
- What similarities do a virus and non living object share?arrow_forwardWhy do most viruses that infect bacteria have tails, whereas most viruses that infect animals and plants do not?arrow_forwardwhat are the key contributors to and consequences of viral genome evolution, and why do RNA viruses evolve faster than DNA viruses?arrow_forward
- 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_forwardSome viruses such as HPV are linked to mutations causing certain types of cancer. What part of a virus life cycle can add mutations to host DNA? What type of bacteriophage, as defined by life cycle, could do this?arrow_forwardWhat is a Hypothetical virusarrow_forward
- Is there such a thing as a “good virus”? Explain why or why not.Consider both bacteriophages and viruses of eukaryotic organisms.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_forwardWhy is it virtually impossible to eradicate (eliminate) a disease caused by a zoonotic virus? Why are RNA viruses and retroviruses more error-prone in their replication than DNA viruses? What effect might this have on the human population?arrow_forward
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