MICROBIOLOGY-MASTERING MICRO.-ACCESS
11th Edition
ISBN: 9780321802705
Author: Tortora
Publisher: PEARSON
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Chapter 13, Problem 4MCQ
Summary Introduction
Introduction:
The enzyme reverse transcriptase or RNA-dependent DNA polymerase is used to synthesize the complementary DNA from an RNA template. This process is often called as reverse transcription process. Viruses such as retrovirus, hepatitis B virus, and hepadna virus use the reverse transcriptase enzyme in their viral biosynthesis mechanism.
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Students have asked these similar questions
If the HIV did not have a reverse transcriptase enzyme, then which of the following would apply?
Select one:
a. The virus can make use of the reverse transcriptase enzyme from the host cell to convert its RNA into
DNA
b. Viral particles will be produced without reverse transcriptase enzyme since the original HIV is an
RNA virus and needs to assemble RNA ant coat proteins together
c. The virus will manufacture its proteins from its RNA using translation and ribosomes from host cell
d. Provirus will not be formed and assembly of viral particles will never occur
e. The virus will not be able to recognise the host cell and therefore entry into the cell is blocked
what event occurs in bacteriophage multiplication that does not occur in animal virus replication?A,B,C,D, or E?
a. adsorption to the host cells.
b. injection of the viral nucleic acid into the host cell.
c. host cell synthesis of viral enzymes and capsid proteins.
d. assembly of nucleocapsids.
e. replication of viral nucleic acid.
Which of the following statements are correct for DNA viruses? Mark all that apply.
A.The genome consists of dsRNA
B. A provirus stage occurs during viral replication
C. The genome consists of two identical strands of DNA
D. Replication requires reverse transcriptase Replication requires DNA polymerase
E.The viral DNA must enter the nucleus for its replication
F. Uncoating must occur for the virus to be replicated
G.The viral genome acts as a template for production of viral proteins
Chapter 13 Solutions
MICROBIOLOGY-MASTERING MICRO.-ACCESS
Ch. 13 - Why do we classify viruses as obligatory...Ch. 13 - List the four properties that define a virus, what...Ch. 13 - Describe the four morphological classes of...Ch. 13 - DRAW IT Label the principal events of attachment,...Ch. 13 - Compare biosynthesis of a + stranded RNA and a ...Ch. 13 - Prob. 6RCh. 13 - Why is it difficult to determine the etiology of a...Ch. 13 - Prob. 8RCh. 13 - Plant viruses can be cultured in (c) __________.Ch. 13 - NAME IT Identify the viral family that infects...
Ch. 13 - Discuss the arguments for and against the...Ch. 13 - In some viruses, capsomeres function as enzymes as...Ch. 13 - Why was the discovery of simian AIDS and feline...Ch. 13 - Prophages and proviruses have been described as...Ch. 13 - Prob. 1MCQCh. 13 - The molecule serving as mRNA can be incorporated...Ch. 13 - Prob. 3MCQCh. 13 - Prob. 4MCQCh. 13 - An example of lysogeny in animals could be a. slow...Ch. 13 - The ability of a virus to infect an organism is...Ch. 13 - Which of the following statements is false? a....Ch. 13 - Prob. 8MCQCh. 13 - Prob. 9MCQCh. 13 - Prob. 10MCQCh. 13 - Prob. 1CAECh. 13 - A newborn female developed extensive vesicular and...Ch. 13 - Prob. 3CAE
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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 statements is not true? Select one: a. Viruses multiply inside living cells using viral - mRNA, tRNA & ribosomes. b. Viruses multiply inside living cells. c. Viruses contain DNA or RNA. d. The nucleic acid of a virus is surrounded by a protein coat. e. Viruses cause the synthesis of specialized infectious elements.arrow_forwardA positive-strand RNA virus: a.must first be converted to a mRNA before viralproteins can be translated b.is not recognized by host ribosomes. c.can directly translate viral proteins. d.will be degraded by host enzymes. e.needs RNA dependent RNA polymerase to get converted into mRNAarrow_forwardWhich of the following enzymes helps the +sense RNA virus Poliovirus to make multiple copies of its genome? A. RNA dependent RNA polymerase B. RNA dependent DNA polymerase C. Reverse transcriptase D. DNA Polymerase I E. DNA dependent RNA polymerasearrow_forward
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- When E. coli cells are mixed with recombinant vector DNA and subject to a stress such as heat shock, a small fraction of the cells will take up the plasmid DNA, a process known as : A. Ligation. B. Transformation. C. Transfection. D. Digestion.arrow_forwardBiosynthesis of an enveloped retrovirus requires which of the following? Mark all that apply. A. production of the viral genome from a provirus B.synthesis of the viral envelope C. production of viral enzymes reverse transcriptase, integrase, and protease D. complementary strands of viral RNA must be synthesizedarrow_forwardWhy are vaccines and/or passive immunization the method of choice in the treatment or prevention of viral infections? A. There are no known inhibitors to reverse transcription B. Viruses are non-living and do not have their own genetic mechanisms to reproduce by themselves hence host cells must rely on targeting the virus or their products. C. Antibodies prevent replication of viral genome D. Antibodies prevent transcription and translation of viral genomes E. All of thesearrow_forward
- Nevirapine, an antiretroviral drug used to treat HIV acts as an uncompetitive inhibitor of the viral enzyme, reverse transcriptase (RT). Where does this inhibitor bind to prevent viral replication? Select one: a. The enzyme-substrate complex b. The viral DNA product c. Directly to reverse transcriptase d. The substrate Humans are able to break down amino acids, removing the amino group from the carbon skeleton and excreting waste as urea. Select the correct sequence of events in this metabolic pathway. Select one: a. Transamination, ammonia assimilation, deamination, ammonia metabolism b. Deamination, transamination, ammonia metabolism, ammonia assimilation c. Deamination, ammonia assimilation, transamination, ammonia metabolism d. Transamination, deamination, ammonia assimilation, ammonia metabolismarrow_forwardAn experimental drug therapy to treat patients with antibiotic-resistant bacteria involves introduction of a highly specific bacteriophage to the infected patient's bloodstream. Which of the following bacteriophage types would be the LEAST useful for this therapy? a. a lytic bacteriophage b. An enveloped virus c. An RNA virus d. a lysogenic bacteriophagearrow_forwardWhich of the following best describes the mechanism of action of the antibiotic streptomycin? A. it disrupts protein synthesis in resistant bacteria. B. Streptomycin inhibits cell wall synthesis in all bacterial species. C. Streptomycin creates mutations in bacteria which cause them to become resistant. D. It disrupts protein synthesis in nonresistant bacteria.arrow_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