Microbiology With Diseases By Taxonomy (6th Edition)
6th Edition
ISBN: 9780134832302
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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Students have asked these similar questions
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
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 vi
A 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) Retroviridae
Chapter 25 Solutions
Microbiology With Diseases By Taxonomy (6th Edition)
Ch. 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 - A man arrived at an emergency room with...Ch. 25 - Prob. 1EDCSCh. 25 - Prob. 2EDCSCh. 25 - Prob. 1MC
Ch. 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. 10MCCh. 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. 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...
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- What are retrovirus-like elements?arrow_forwardWhy are retroviruses prone to accumulating oncogenes?arrow_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
- In 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_forwardAnswer the following regarding the varicella-zoster virus: a) the biology of the virus ( type: DNA/RNA type: single or double stranded) b) how it replicates c) life cycle of the virus (binding, fusion, reverse transcription, integration, replication, and assembly)arrow_forwardWhat enzyme is responsible for the production of viral DNA from a retrovirus?arrow_forward
- What is the function of reverse transcriptase in retroviruses? a) It converts viral RNA into double-stranded DNA Ob) It uses viral RNA as a template for making complementary RNA strands Oc) It translates viral RNA into proteins d) It uses viral DNA as a template for RNA synthesisarrow_forwardWhich of the following statements is not correct forviruses?(a) Viruses are obligate parasites.(b) Viruses can multiply only when they are inside theliving cells.(c) Viruses cannot pass through bacterial filters.(d) Viruses are made up of protein and DNA or RNA(never both DNA and RNA). Please try to break the solutions into as many steps as practically possible and the steps should come one by one and they should be short and crisp and plagiarism-free.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
- The major issue associated with the use of live, attenuated virus for vaccines is _____. A) reversion to virulent strain that causes disease B) ineffectiveness because it’s not “the real thing” C) contamination with other viruses or bacteria D) the capacity to induce shock in recipientsarrow_forwardWhich of the following is characteristic of the lytic cycle? a) The virus-host relationship usually lasts for generations b) The viral genome replicates by destroying the host cell c) A single phage being released at a time d) Viral DNA is incorporated into the host genomearrow_forwardWhat are three reasons that retroviruses are studied so much these days?arrow_forward
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