EBK MICROBIOLOGY:W/DISEASES BY BODY...-
5th Edition
ISBN: 9780134608242
Author: BAUMAN
Publisher: PEARSON
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Chapter 13, Problem 8CT
Why has it been difficult to develop a complete taxonomy for viruses?
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How many millions of bases are in the genome of
the mimivirus or largest virus known?
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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
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Chapter 13 Solutions
EBK MICROBIOLOGY:W/DISEASES BY BODY...-
Ch. 13 - Why are naked icosahedral viruses able to...Ch. 13 - What characteristics of the genomes of...Ch. 13 - Prob. 3TMWCh. 13 - Prob. 1EDCSCh. 13 - Prob. 4TMWCh. 13 - Prob. 5TMWCh. 13 - Prob. 6TMWCh. 13 - Prob. 7TMWCh. 13 - Prob. 1CCSCh. 13 - Prob. 1MC
Ch. 13 - Prob. 2MCCh. 13 - Prob. 3MCCh. 13 - Prob. 4MCCh. 13 - Prob. 5MCCh. 13 - Prob. 6MCCh. 13 - Prob. 7MCCh. 13 - Prob. 8MCCh. 13 - Prob. 9MCCh. 13 - Prob. 10MCCh. 13 - Prob. 1MCh. 13 - Prob. 1VICh. 13 - Prob. 2VICh. 13 - Prob. 1SACh. 13 - Prob. 2SACh. 13 - Prob. 3SACh. 13 - Prob. 4SACh. 13 - Prob. 5SACh. 13 - What is the difference between a virion and a...Ch. 13 - How is a provirus like a prophage? How is it...Ch. 13 - Prob. 8SACh. 13 - Prob. 9SACh. 13 - Prob. 10SACh. 13 - Prob. 1CTCh. 13 - Prob. 2CTCh. 13 - Prob. 3CTCh. 13 - Prob. 4CTCh. 13 - Prob. 5CTCh. 13 - Prob. 6CTCh. 13 - Prob. 7CTCh. 13 - Why has it been difficult to develop a complete...Ch. 13 - Prob. 9CTCh. 13 - What differences would you expect in the...Ch. 13 - Prob. 11CTCh. 13 - Prob. 12CTCh. 13 - Prob. 13CTCh. 13 - Using the following terms, fill in the following...
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- What is the function of the CRISPR/Cas system? What are the ethical impacts of a CRISPR? What is the main parameter that is used to define new virus families among archaeal viruses? Explain the stages through which bacteria and archaea fight back against infection with viruses.arrow_forwardwhy do baceria and viruses make good model systems for various genetic studies?arrow_forwardThe table below shows the properties of the genomes of three different viruses. The data were obtained as follows: Nuclease sensitivity was measured by the ability of deoxyribonuclease (DNase) or ribonuclease (RNase) to destroy the genome (a “+" means sensitivity). The ability of the genome to act as mRNA was tested by incubating it in a cell-free system. If amino acids were incorporated into protein, the data are shown as a Finally, the virus particles were tested for the presence of a virion polymerase. If an enzyme was present, the data show whether it could polymerize deoxynucleotide triphosphates (DNTPS) or nucleoside triphosphates (NTPS). "+. Genome Properties Nuclease Virion Can Genome Sensitivity? Polymerase? Be an mRNA? Virus DNase RNase With With DNTPS NTPS #1 - - #2 - - #3 For each virus, indicate the strategy of the genome, using the Baltimore classification. What is the nature of the product of the virion polymerase when present? + + + + + +arrow_forward
- Explain what must be done to identify RNA viruses using genetictechniques.arrow_forwardYou have isolated a new virus that you want to classify using the Baltimore approach to classification. However, you don’t have much to work with. Just an agarose gel, ethidium bromide to strain the nucleic acid on the gel, and a set of enzymes. Assume you have pure virus. Enzyme A digests ssDNA, Enzyme B digests all DNA, and Enzyme C digests ssRNA. Base hydrolysis digests all RNA. You run a gel and get the results below after staining with ethidium bromide: From these results, what type of genome do you think the virus has? Briefly explain your answer.arrow_forwardClassification of viruses is based on all of the following excepta) type of nucleic acid. b) shape of virus.c) size of virus. d) host infected.e) strandedness of nucleic acid.arrow_forward
- Which of the following are the functions of reverse transcriptase in retroviruses? i) it hydrolyzes the host cell's DNA ii) it uses viral RNA as a template for DNA synthesis iii) it converts host cell RNA into viral DNA iv) it translates viral RNA into proteins v) It uses viral RNA as a template for making complementary RNA strand vi) It degrades RNA from DNA-RNA hybrid Oi, iv and v O ii, iv, v and vi ii and iii ii and viarrow_forwardWho discovered retrovirus?arrow_forwardHow do i obtain gene sequences from a plasmodium falciparum whole genome sequence?arrow_forward
- Why is it necessary for some ssDNA viruses to manufacture a replicative form?arrow_forwardWhat are taxonomic aids? Mention some of the taxonomic aids for identification.arrow_forwardA particular animal virus requires the use of DNA polymerase from its host, since it does not possess its own DNA polymerase enzyme. Which of the following assumptions in A-D would likely be correct regarding this virus? A) O This virus could not be a retrovirus type. B) OIt could be a (-) ss RNA virus. C) O It could be a (+) ss RNA virus. D) O The vVirus life cycle very likely includes going to the host cell nucleus. E) O All ofA-D are correct assumptions.arrow_forward
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