Prescott's Microbiology
10th Edition
ISBN: 9781259281594
Author: Joanne Willey, Linda Sherwood Adjunt Professor Lecturer, Christopher J. Woolverton Professor
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 6.3, Problem 1RIA
Explain why the receptors that viruses have evolved to use are host surface proteins that serve very important, and sometimes essential, functions for the host cell.
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How do cellular receptors for viruses come about?
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Considering that each virus must bind to a specific cell surface receptor for attachment, explain how you would create a drug that prevents viral attachment.
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Chapter 6 Solutions
Prescott's Microbiology
Ch. 6.2 - MICRO INQUIRY Which capsids are icosahedral? Which...Ch. 6.2 - MICRO INQUIRY Are the capsomers at the vertices of...Ch. 6.2 - MICRO INQUIRY Why is T4 said to have binal...Ch. 6.2 - Retrieve, Infer, Apply 1. How are viruses similar...Ch. 6.2 - Retrieve, Infer, Apply 2. What is the difference...Ch. 6.2 - Retrieve, Infer, Apply 3. Compare the structure of...Ch. 6.2 - Retrieve, Infer, Apply 4. What is an envelope?...Ch. 6.2 - Retrieve, Infer, Apply 5. All four nucleic acid...Ch. 6.2 - Retrieve, Infer, Apply 6. The RNA genomes of some...Ch. 6.3 - MICRO INQUIRY Which of these mechanisms involves...
Ch. 6.3 - MICRO INQUIRY Why do the empty capsids remain...Ch. 6.3 - Explain why the receptors that viruses have...Ch. 6.3 - What probably plays the most important role in...Ch. 6.3 - How do you think the complexity of the viral...Ch. 6.3 - In general, DNA viruses can be much more dependent...Ch. 6.3 - Consider the origin of viral envelopes and suggest...Ch. 6.3 - Why are the proteins involved in virion assembly...Ch. 6.4 - Why is a lysogen considered a new or different...Ch. 6.4 - Define the terms lysogeny, temperate phage,...Ch. 6.4 - What advantages might a phage gain by being...Ch. 6.4 - Describe lysogenic conversion and its...Ch. 6.4 - How does a latent infection differ from a chronic...Ch. 6.4 - What is a cytocidal infection? What is a...Ch. 6.4 - Define the following terms: tumor, neoplasia,...Ch. 6.4 - Distinguish the mechanism by which dsDNA viruses...Ch. 6.5 - Prob. 1MICh. 6.5 - Prob. 1RIACh. 6.5 - Given that viruses must be cultivated to make...Ch. 6.7 - What are viroids and why are they of great...Ch. 6.7 - How does a viroid differ from a virus? From a...Ch. 6.7 - What is a prion? In what way does a prion differ...Ch. 6.7 - Prob. 4RIACh. 6 - Many classification schemes are used to identify...Ch. 6 - The origin and evolution of viruses is...Ch. 6 - Consider the separate stages of an animal virus...Ch. 6 - Chronic wasting disease (CWD) is a...Ch. 6 - Syn5 is a virus that infects photosynthetic...
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- Host specificity of a virus is due to O 1) similarities in size between the virus and the host cell. O 2) the presence or absence of a cell wall on the host cell. O 3) particular genes that it shares with the infected cell. 4) compatibility between viral and cellular surface molecules. 5) the presence of an envelope.arrow_forwardBriefly explain two different mechanisms an enveloped virus uses for entry into the host cell.arrow_forwardIn electron micrographs of HSV infection, it can be seen that the intact virus initially reacts with cell-surface proteoglycans, then with specific receptors. This is later followed by viral capsids docking with nuclear pores. Afterward, the capsids go from being full to being "empty." Which of the following statements best fits these observations? The viral envelope is not required for infectivity, since the envelope does not enter the nucleus. The viral envelope mediates entry into the cell, the capsid mediates entry into the nuclear membrane, and the genome is all that enters the nucleus. Only the genetic material of the virus is involved in the cell's infectivity, and is injected into the host cell like the genome of a phage. Viral capsids are needed for the cell to become infected; since the full capsids enter the nucleus.arrow_forward
- Give three examples of host cell proteins that are used by viruses, and in each case describe which virus uses them, and for what purpose.arrow_forwardDescribe two mechanisms a virus might use to prevent the induction of apoptosis in an infected cell.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
- 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_forwardRhinovirus and the flaviviruses have a _________ RNA genome, which ___________________ bind in order for translation to occur. As with most viruses with such genomes, they produce a ________________ (type of peptide), which is cleaved in order to produce the individual viral proteinsarrow_forwardDescribe the structural features of the human immunodefi ciency virus and the host cell membrane that are required for infection to occur.arrow_forward
- Consider the separate stages of an animal virus life cycle. Assemble a short list of structures and processes that are unique to the virus and would make good drug targets for an antiviral agent. Explain your rationale for each choice.arrow_forwardWhat is meant when it is said that a virus is in an inactive state?arrow_forwarda. Which type of viruses can be directly used for translation? a) dsRNA b) Positive ssRNA c) Retroviruses d) Negative ssRNA b. An antiviral drug specifically modifies viral receptors on a eukaryotic host cell. How might this affect the viral reproductive cycle? It would enhance the process of viral apoptosis It would result in the degeneration of the viral capsid It would facilitate the process of viral endocytosis It would prevent the virus from attaching to the host cellarrow_forward
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What Is A Virus ? ; Author: Peekaboo Kidz;https://www.youtube.com/watch?v=YS7vsBgWszI;License: Standard YouTube License, CC-BY