Microbiology with Diseases by Taxonomy (5th Edition)
5th Edition
ISBN: 9780134019192
Author: Robert W. Bauman Ph.D.
Publisher: PEARSON
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Textbook Question
Chapter 25, Problem 6CT
Reverse transcriptase is notoriously sloppy in making DNA copies from ssRNA templates. How do retroviruses survive when their genomes are subject to such shoddy replication?
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The genome of a retrovirus can integrate into the host cell genome. What gene is unique to retroviruses, and why is the protein encoded by this gene absolutely necessary for maintaining the retroviral life cycle?
Which of the following statements regarding retroviruses is FALSE?
A) a cellular enzyme converts the RNA genome into DNA
B) double-stranded DNA is transcribed into mRNA by cellular enzymes
C) retroviral genomes consist of positive-sense RNA
D) the virus commonly integrates into the host chromosome as a provirus
E) viral RNA enters the nucleus
F) ALL of these statements are TRUE
What enzyme is used by a retrovirus to make a DNA copy of its genome?
Chapter 25 Solutions
Microbiology with Diseases by Taxonomy (5th Edition)
Ch. 25 - Prob. 1MCCh. 25 - What do viruses in the families Picornaviridae,...Ch. 25 - Prob. 3MCCh. 25 - Prob. 4MCCh. 25 - Prob. 5MCCh. 25 - Prob. 6MCCh. 25 - Prob. 7MCCh. 25 - Prob. 8MCCh. 25 - Prob. 9MCCh. 25 - Prob. 10MC
Ch. 25 - Prob. 11MCCh. 25 - Prob. 1MCh. 25 - Prob. 1TFCh. 25 - _________ All infections of polio are crippling.Ch. 25 - Prob. 3TFCh. 25 - Prob. 4TFCh. 25 - Prob. 5TFCh. 25 - Label the steps in retroviral replication shown...Ch. 25 - Prob. 2VICh. 25 - Prob. 1SACh. 25 - Prob. 2SACh. 25 - Prob. 3SACh. 25 - Prob. 4SACh. 25 - Prob. 5SACh. 25 - Prob. 6SACh. 25 - Prob. 7SACh. 25 - Prob. 8SACh. 25 - Prob. 9SACh. 25 - Prob. 10SACh. 25 - Prob. 11SACh. 25 - Prob. 1CTCh. 25 - A 20-year-old man is brought to a South Carolina...Ch. 25 - Prob. 3CTCh. 25 - Prob. 4CTCh. 25 - Prob. 5CTCh. 25 - Reverse transcriptase is notoriously sloppy in...Ch. 25 - Prob. 1CMCh. 25 - Why might enteroviruses, which infect the body...Ch. 25 - Prob. 2TMWCh. 25 - Prob. 3TMWCh. 25 - Prob. 4TMWCh. 25 - Prob. 5TMWCh. 25 - Prob. 6TMWCh. 25 - Prob. 1EDCSCh. 25 - Prob. 2EDCSCh. 25 - A man arrived at an emergency room with...Ch. 25 - Prob. 2CCS
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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
- Which of the following are the functions of reverse transcriptase in retroviruses? i) it hydrolyzes the host cell's DNA ii) it uses viral RNA as a template for DNA synthesis iii) it converts host cell RNA into viral DNA iv) it translates viral RNA into proteins v) It uses viral RNA as a template for making complementary RNA strand vi) It degrades RNA from DNA-RNA hybrid Oi, iv and v O ii, iv, v and vi ii and iii ii and viarrow_forwardPlease answer the following statement with yes or false. If your answer is incorrect it will delete the correct answer 43)..The end products for the RNA dependent RNA polymerase is ssRNA. 44) ...The end products of the DNA dependent RNA polymerase is ss RNA. 45)..The end products of the viral RNA dependent DNA polymerase is SSDNA ..The end product of the viral DNA dependent DNA polymerase is SSDNA 46). 47) .The end product of the viral integrase enzyme is a provirus. 48) The end product of the PB1 enzyme is SSDNAarrow_forwardA viral particle adsorbs onto a host cell membrane. It uncoats and releases its single-stranded nonsegmented nucleic acid into the cytoplasm where it is immed dependent RNA polymerase, into mRNA. It is then translated into viral structural proteins and enzymes. Which of the following virus families is most likely repre A) Herpesviridae B) Paramyxoviridae C) Parvoviridae D) Reovirius E) Retroviridaearrow_forward
- What is crystallization of a virus? What is the importance of this process?arrow_forwardIf you wanted to use the replication of a virus to simulate the process of replication of an animal cell, which type of virus would you choose to simulate the replication process found in an animal cell? dsDNA -SSRNA dsRNA +ssRNA ssDNAarrow_forwardWhat would happen to a virus that found its way to an environment filled only with cells that were outside of its host range? a) This virus would evolve until it was able to use the surrounding cells as hosts b) This virus would actively transport itself to another area in search of host cells C) This virus would replicate until it found cells that were within its host range d) Nothing; this virus would not be replicatedarrow_forward
- Retroviruses are dependent on reverse transcriptase, which does which of the following? Transcribes RNA backward (3' to 5' instead of 5' to 3') None of these are correct. Creates transcripts from an RNA template Creates a DNA copy of an RNA template.arrow_forwardMatch each of the following replication classes of viruses with the one description that best describes it. This virus class is composed of segmented and non-segmented helical viruses that carry an RdRp within the virion into the cell. Example: Rabies virus These viruses are non- enveloped, icosahedral, have segmented genomes, and carry their own RNA-dependent RNA polymerase. The viral genome is copied following assembly. Example: Reovirus This is the only class of RNA viruses whose genome is replicated by cellular enzymes and not an RNA-dependent RNA polymerase. Cellular DNA polymerases replicate this virus's non- integrated genome, although transcription is not the initial event that takes place in the process. Example: Parvoviruses In this class of viruses, transcription occurs before genome replication because viral proteins are involved in replicating the genome. Example: Adenovirus This class of viruses forms circular DNA and creates pre- genomic RNA using host RNA polymerases.…arrow_forwardIn retroviruses, transcription of the provirus: A) converts viral RNA into viral DNA B) does not result in production of viral protein components C) is done by reverse transcriptase D) represents replication of viral genome/nucleic acidarrow_forward
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