Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 21, Problem 9RQ
Which statement is not true of viral replication?
- A lysogenic cycle kills the host cell
- There are six basic steps in the viral replication cycle
- Viral replication does not affect host cell function
- Newly released virions can infect adjacent cells.
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Match each stage of the viral replication cycle with the one definition that best describes it.
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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. Assembly
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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(Endosymbiosis), viruses are suggested to have contributed to cellular nucleic acid becoming DNA instead of RNA. What stages in the viral life cycle could have led to this phenomenon?.
Chapter 21 Solutions
Biology 2e
Ch. 21 - Figure 21.5 Which of the following statements...Ch. 21 - Figure 21.8 Influenza virus is packaged in a viral...Ch. 21 - Figure 21.10 Which of the following statements is...Ch. 21 - Which statement is true? A virion contains DNA and...Ch. 21 - The viral______play(s) a role in attaching a...Ch. 21 - Viruses. all have a round shape cannot have a long...Ch. 21 - The observation that the bacteria genus Chlamydia...Ch. 21 - A scientist discovers a new virus with a linear,...Ch. 21 - Which statement is not true of viral replication?...Ch. 21 - Which statement is true of viral replication? In...
Ch. 21 - Which statement is true of reverse transcriptase?...Ch. 21 - Oncogenic virus cores can be. RNA DNA neither RNA...Ch. 21 - Which is true of DNA viruses? They use the host...Ch. 21 - A bacteriophage can infect the lungs viruses...Ch. 21 - People with the CCR5?32 mutation of a T-cell...Ch. 21 - An apple grower notices that several of his apple...Ch. 21 - Which of the following is NOT used to treat active...Ch. 21 - Vaccines. are similar to viroids are only needed...Ch. 21 - A patient presents at the clinic with an acute...Ch. 21 - Which of the following is not associated with...Ch. 21 - Which statement is true of viroids? They are...Ch. 21 - The first electron micrograph of a virus (tobacco...Ch. 21 - Varicella-zoster virus is a double-stranded DNA...Ch. 21 - Classify the Rabies virus (a rhabdovirus family...Ch. 21 - Why can’t dogs catch the measles?Ch. 21 - One of the first and most important targets for...Ch. 21 - In this section, you were introduced to different...Ch. 21 - Although plant viruses cannot infect humans, what...Ch. 21 - A bacteriophage with a lytic life cycle develops a...Ch. 21 - Why is immunization after being bitten by a rabid...Ch. 21 - The vaccine Gardasil that targets human papilloma...Ch. 21 - Prions are responsible for variant Creutzfeldt...Ch. 21 - How are viroids like viruses?Ch. 21 - A botanist notices that a tomato plant looks...
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- All viral genomes contain nucleic acid, either DNA or RNA but not both. Viral replication is the formation of biological viruses during the infection process in the target host cell. Viruses must first enter the host cell before viral replication can occur. After gaining entry into a cell, the viral genome has to be first replicated using either the host DNA polymerase or RNA polymerase You are studying two viruses: Virus A is an enveloped RNA virus Virus B is non-enveloped DNA virus Which of the above viruses is likely to have the lowest mutation rate in the host cell? O Virus A because it uses the host RNA polymerase which has lower error rate than DNA polymerase. O Virus A because it uses the host DNA polymerase which has lower error rate than RNA polymerase. O Virus B because it uses the host DNA polymerase which has lower error rate than RNA polymerase. O Virus B because it uses the host RNA polymerase which has lower error rate than DNA polymerase.arrow_forwardWhich of the following represents the correct stages (in order) of VIRAL replication? a-Replication, assembly, entry, attachment, lysis b-Lysis, assembly, entry, attachment, replication c-Attachment, entry, replication, assembly, lysis d-Lysis, assembly, replication, entry, attachmentarrow_forwardWhich of the following terms is used for the stage of viral replication primarily responsible for host range specificity? Maturation Penetration Release O Adsorption Replicationarrow_forward
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- All of the following statements correctly describes the properties of Influenza A virus EXCEPT A-Viral transcription occurs in the nucleus B-Mature virion are released by budding C-Single stranded positive sense RNA virus D-Attaches to cell-surface sialic acidarrow_forwardWhich of the following statements is TRUE concerning viral envelopes? Only viruses with envelopes have their contents enclosed by a layer containing lipids Only viruses without envelopes interact with receptor proteins on the surface of the host cell. Only viruses without envelopes can release their genetic material into the cytoplasm of the host. Only viruses with envelopes package their genetic material by engulfing it.arrow_forwardName 1 cellular process that some viruses exploit to enter cells. Give an example of a virus that uses this process and explain in 2-3 sentences how the virus exploits that processarrow_forward
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