Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 25.4, Problem 1R
Summary Introduction
To review:
The effect of the size of the viral genomes on the phylogenetic analyses of viruses.
Introduction:
Viruses are nonliving when present outside the host and perform living organism functions as soon as they come into contact with the host cell or tissue. They play an important role in several areas but their proper habitat and evolution are still not clear. The diseases caused by viruses are very difficult to treat due to their constantly mutating genome.
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How many millions of bases are in the genome of
the mimivirus or largest virus known?
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What are living characteristics of viruses?
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Life: The Science of Biology
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- What is the main parameter that is used to define new virus families among archaeal viruses? What are the stages through which bacteria and archaea fight back against infection with viruses?arrow_forwardCompared with cells, what is unusual about viral genomes?arrow_forwardName any three viruses which have RNA as a genetic material?arrow_forward
- What is a nucleocapsid? Give examples of viruses with the twocapsid types.arrow_forwardWhat type of genome is seen in most archaeal viruses?arrow_forward27. Class VI animal viruses include HIV, Based on the type of viral genome, how is this class distinguished from the other classes of animal virus? A) It has double stranded RNA. B) It has single stranded RNA that serves as mRNA (positive sense). C) It has single stranded RNA that serves as a template for the synthesis of DNA. D) It has single stranded RNA that serves as a template for mRNA (anti-sense). does HIVarrow_forward
- what's the reason behind evolution of RNA virus recombination?arrow_forwardWhy do most viruses that infect bacteria have tails, whereas most viruses that infect animals and plants do not?arrow_forwardExplain the reason why segmentation of the genome provides a strong evolutionary advantage for negative strand viruses.arrow_forward
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