PRESCOTT'S MICROBIOLOGY
11th Edition
ISBN: 2818440045677
Author: WILLEY
Publisher: MCG
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Textbook Question
Chapter 26.2, Problem 2.3CC
Many small DNA viruses rely on host enzymes for replication and transcription. Why are megaviruses able to use their own DNA-dependent RNA polymerases and DNA polymerases?
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Students have asked these similar questions
we 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)budding
Which statement is true of viral replication?
A) virus attaches to a specific receptor site on the host-cell membrane. B) Once inside the cell, the viral capsid is degraded, and the viral nucleic acid is released. C) Virus uses the host cell’s machinery to replicate and new virus particles are released. D) All of the above
Which is the usual order of a viral replication cycle when it is making new virions?
O Host recognition > replication > entry > uncoating > release
O Uncoating > host recognition > replication > entry > release
O Prophase > metaphase > anaphase > telophase > cytokinesis
Host recognition > entry > uncoating > replication > release
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Chapter 26 Solutions
PRESCOTT'S MICROBIOLOGY
Ch. 26.1 - List some characteristics used in classifying...Ch. 26.1 - Prob. 2CCCh. 26.2 - Prob. 1MICh. 26.2 - Why do you think T4 evolved to initiate DNA...Ch. 26.2 - What function does HMC glycosylation serve?Ch. 26.2 - Explain why the T4 genome is circularly permuted.Ch. 26.2 - Prob. 1.2CCCh. 26.2 - How is a prophage induced to become active again?Ch. 26.2 - Describe the roles of cII, CIII, repressor (CI),...Ch. 26.2 - How do the temperate phages Mu and P1 differ from...
Ch. 26.2 - How is the envelope of this virus formed? How does...Ch. 26.2 - Why do cold sores recur throughout the lifetime of...Ch. 26.2 - In what part of the host cell does a herpesvirus...Ch. 26.2 - Many small DNA viruses rely on host enzymes for...Ch. 26.3 - Why is the X174 genome considered plus stranded?Ch. 26.3 - Why is it necessary for some ssDNA viruses to...Ch. 26.3 - Prob. 2CCCh. 26.3 - How do parvoviruses trick the host DNA polymerase...Ch. 26.4 - The rotavirus genome encodes 12 proteins. Suggest...Ch. 26.4 - Describe the life cycle of 6 phage. What makes...Ch. 26.4 - Prob. 3CCCh. 26.4 - In what ways are the life cycles of 6 and...Ch. 26.5 - Where in the host does the plus-strand RNA genome...Ch. 26.5 - How do some plus-strand viruses use polyproteins...Ch. 26.5 - What is an IRES? Why is it important?Ch. 26.5 - Prob. 3CCCh. 26.6 - How does that use of a segmented genome by...Ch. 26.6 - Prob. 2CCCh. 26.7 - Prob. 1MICh. 26.7 - Prob. 1CCCh. 26.7 - Prob. 2CCCh. 26.7 - Prob. 3CCCh. 26.8 - Prob. 1CCCh. 26.8 - Trace the HBV multiplication cycle, paying...Ch. 26 - Prob. 1RCCh. 26 - Prob. 2RCCh. 26 - Prob. 3RCCh. 26 - Prob. 4RCCh. 26 - No temperate RNA phages have yet been discovered....Ch. 26 - The choice between lysogeny and lysis is...Ch. 26 - Prob. 3ALCh. 26 - You are studying RNA viruses and have discovered a...Ch. 26 - Prob. 5ALCh. 26 - Prob. 6AL
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- Describe the functions of the transcriptase/replicase complex in coronavirus replication.arrow_forwardSome viral genomes, composed of single-stranded RNA, act as mRNA. What advantage might these viruses have over other kinds of viruses?arrow_forwardArrange the following list into the correct sequence for part of the cycle of a retrovirus: 1. dsDNA integrated into host DNA 2.viral proteins synthesized on host ribosomes 3. viral DNA uses host enzymes to transcribe viral RNA 4. reverse transcriptase catalyzes synthesis of ssDNA 5. synthesis of second DNA strand (a) 5, 2, 1, 3, 4 (b) 5, 2, 3, 4, 1 (c) 4, 5, 1, 3, 2 (d) 4, 1, 2, 3, 5 (e) 2, 1, 3, 4, 5arrow_forward
- 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) Retroviridaearrow_forwardWhich of the following viral components must get into a cell's cytoplasm in order for the virus to be replicated? A) Protein spikes B) The virus envelope C) The virus genome D) The virus capsidarrow_forward. Disabling surface protease enzymes on lung cells would most likely interfere with what stage of viral reproduction? A). Viral RNA replication. B). Virus binding to the host cell. C). Formation of new virus membranes in the host cell. D). Creation of new spike protein.arrow_forward
- Match each stage of the viral replication cycle with the one definition that best describes it. ¡¡¡ The stage at which nascent virions leave the cell The virus adheres to the surface of the cell The viral nucleic acid is released into the cell The stage at which virions become infectious The construction of new virions composed of viral proteins and the replicated genome The stage at which the viral genome is copied The virus passes into the cell from the extracellular environment 1. Attachment 2. Replication 3. Maturation 4. Release 5. Penetration 6. Uncoating 7. Assemblyarrow_forwardHost 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_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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