RNA virus populations derive their genetic variation from what process? Transcription from the host cell RNA polymerase introduces numerous mutations. Capsid proteins from the host cell can replace the viral capsid. Viral RNA is translated by host cell ribosomes. High mutation rate due to lack of proofreading of RNA genome replication errors.

RNA virus populations derive their genetic variation from what process? Transcription from the host cell RNA polymerase introduces numerous mutations. Capsid proteins from the host cell can replace the viral capsid. Viral RNA is translated by host cell ribosomes. High mutation rate due to lack of proofreading of RNA genome replication errors.

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter24: Viruses And Subviral Agents

Section: Chapter Questions

Problem 10TYU: Arrange the following list into the correct sequence for part of the cycle of a retrovirus: 1. dsDNA...

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Arrange 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, 5
A bacteriophage has inserted its DNA into a bacterial host and replicated as a part of the host’s genome for several generations as the host reproduces. For this virus to assemble more infectious viral particles, what must it do? Switch to the lysogenic cycle of replication Switch to the vicious cycle of replication Purposefully mutate its own genes Switch to the lytic cycle of replication
A virus (bacteriophage) attaches to a host bacterial cell, inserts the viral DNA into the cell. Right away, the DNA from the virus is is replicated, and synthesis of viral components occurs in the cytoplasm. Which of the following describes what is occurring here? A lytic cycle of bacteriophage replication. Entry to the lysogenic cycle. Horizontal gene transfer. Integration of a prophage into the host genome.
. Which of the following biological systems holds the record for the largest range of genome sizes? double-stranded DNA viruses single-stranded RNA viruses single-stranded RNA viroids single-stranded DNA viruses double-stranded RNA viruses
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
Influenza viruses use to replicate its genome whereas retroviruses use before they can integrate their genome into the host DNA. A. reverse transcriptase; RNA dependent RNA polymerase B. RNA dependent RNA polymerase; reverse transcriptase C. replicase; DNA polymerase D. DNA polymerase, replicase
You are a virologist studying a newly isolated viral strain and have sequenced its genome. You find that the genome contains 25% A, 55% G, 20% C, and 10% U. Which of the following conclusions is likely correct? This is a single-stranded RNA virus This is a single-stranded DNA virus This is a double-stranded RNA virus This is a double-stranded DNA virus No conclusions can be drawn from this information
Influenza Virus has a genome and can jump hosts easily because of its genome A. DNA; reassortment B. RNA; reassortment C. DNA; recombination D. RNA; recombination
Assume you isolate a single stranded (+) RNA virus. When you examine the proteins in the virus, you find that it does NOT contain replicase enzymes within its capsid. Which of the following is true? This virus must have a gene that encodes replicase. This virus will not be able to enter a host cell. Its genome cannot be translated (the process of translation) by the host cell ribosomes. A DNA copy of the viral genome has to be made before viral genes are expressed. This virus must lack surface antigens.
A virus that has which type of genome must carry replicase within the viral particle? (choose all that apply) ds DNA ss (+) DNA ss (–) DNA ss (+) RNA ss (–) RNA Which viral type has a genome that can be directly translated? (choose all that apply) ds DNA ss (+) DNA ss (–) DNA ss (+) RNA ss (–) RNA
After a virus has entered its host, what factor usually determines the manner (or steps) in which the viral genome is copied and the viral enzymes are produced? the size of the virion the number of infecting virus particles the type of viral genome the type of viral capsid
Which of the following is common in animal viruses but NOT in bacteriophage? a. DNA b. Capsid c. Envelope d. Icosahedral shape