Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Textbook Question
Chapter 19, Problem 11TYK
An RNA viral genome may be replicated by
- a. DNA polymerase from the host.
- b. RNA polymerase coded by viral genes and carried in the viral capsid.
- c. reverse transcriptase that synthesizes RNA.
- d. RNA polymerase from the host.
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Which of the following would be the first step in biosynthesis of a virus with a - (minus) strand of RNA?
A. Synthesis of double stranded RNA from a DNA template
B. Transcription of mRNA from DNA
C. Synthesis of DNA from an RNA template
D. Synthesis of double stranded RNA from an RNA template
E. Synthesis of DNA from a DNA template
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
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b. Viral particles will be produced without reverse transcriptase enzyme since the original HIV is an
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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
How does a retrovirus prepare its genetic material for incorporation into the host cell genome?
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Host enzymes incorporate viral RNA directly into the genome.
b.
Host enzymes covert viral RNA to double-stranded viral DNA.
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Viral reverse transcriptase uses viral RNA to make double-stranded viral RNA.
d.
Viral reverse transcriptase uses viral RNA to make double-stranded viral DNA.
e.
Viral reverse transcriptase uses viral single-stranded DNA to make double-stranded viral DNA.
Chapter 19 Solutions
Study Guide for Campbell Biology
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- After attachment and entry, the next step of viral lifecycle is to A.translate viral proteins B. assembly new viral particles C. replicate the genome D. release new virionsarrow_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_forwardTo infect their specific host cells, viruses go through these chronological steps EXCEPT a. Release of progeny viruses b. Absorption and penetration of the viral particles c. Uncoating of the nucleic acid of the viral particles d. Synthesis and assembly of viral particle componentsarrow_forward
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- Biosynthesis 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_forwardSymptoms of viral infections are caused by: (choose all that apply) A. Actions of the virus that result in cell damage or death B. Actions of the immune system that result in cell damage or death C. Changes in a cell's genetics that result in cancerarrow_forwardWhich 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_forward
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