Brock Biology of Microorganisms (14th Edition)
14th Edition
ISBN: 9780321897398
Author: Michael T. Madigan, John M. Martinko, Kelly S. Bender, Daniel H. Buckley, David A. Stahl, Thomas Brock
Publisher: PEARSON
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Chapter 9.6, Problem 3MQ
Summary Introduction
Adenovirus is the most common virus which causes common cold and flu. Adenovirus has a broad range of host’s mostly vertebrate animals. Adenovirus measures about 90 – 100 nm in size. Mostly they are non-enveloped and have double-stranded DNA as their genome.
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Chapter 9 Solutions
Brock Biology of Microorganisms (14th Edition)
Ch. 9.1 - Distinguish between a positive-strand RNA virus...Ch. 9.1 - Prob. 2MQCh. 9.1 - Prob. 3MQCh. 9.2 - Prob. 1MQCh. 9.2 - Prob. 2MQCh. 9.2 - Prob. 3MQCh. 9.3 - Prob. 1MQCh. 9.3 - In the X174 genome, describe the difference...Ch. 9.3 - Prob. 3MQCh. 9.4 - In what major way does transcription of phage DNA...
Ch. 9.4 - Prob. 2MQCh. 9.5 - What type of genome is seen in most archaeal...Ch. 9.5 - Compared with other archaeal viruses, what are two...Ch. 9.6 - Prob. 1MQCh. 9.6 - Prob. 2MQCh. 9.6 - Prob. 3MQCh. 9.7 - Prob. 1MQCh. 9.7 - Prob. 2MQCh. 9.7 - Prob. 3MQCh. 9.8 - Prob. 1MQCh. 9.8 - Prob. 2MQCh. 9.8 - How are protein synthesis and genomic replication...Ch. 9.9 - Prob. 1MQCh. 9.9 - Prob. 2MQCh. 9.9 - Prob. 3MQCh. 9.10 - Prob. 1MQCh. 9.10 - Prob. 2MQCh. 9.10 - Prob. 3MQCh. 9.11 - Prob. 1MQCh. 9.11 - Prob. 2MQCh. 9.11 - How does the role of reverse transcriptase in the...Ch. 9.12 - If viroids are circular molecules, why are they...Ch. 9.12 - Prob. 2MQCh. 9.13 - Prob. 1MQCh. 9.13 - Prob. 2MQCh. 9.13 - Prob. 3MQCh. 9 - Prob. 1RQCh. 9 - Describe the classes of viruses based on their...Ch. 9 - REVIEW QUESTIONS
3. How might viruses help...Ch. 9 - Prob. 4RQCh. 9 - Describe how the genome of bacteriophage X174 is...Ch. 9 - Why can it be said that transcription of the...Ch. 9 - Prob. 7RQCh. 9 - Prob. 8RQCh. 9 - Prob. 9RQCh. 9 - Prob. 10RQCh. 9 - Prob. 11RQCh. 9 - Prob. 12RQCh. 9 - Prob. 13RQCh. 9 - Prob. 14RQCh. 9 - Rabies virus and poliovirus both have...Ch. 9 - Prob. 16RQCh. 9 - Why do both hepadnaviruses and retroviruses...Ch. 9 - Prob. 18RQCh. 9 - What are the similarities and differences between...Ch. 9 - Prob. 20RQCh. 9 - Not all proteins are made from the RNA genome of...Ch. 9 - Replication of both strands of DNA in adenoviruses...Ch. 9 - Imagine that you are a researcher at a...Ch. 9 - Prob. 4AQ
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- What is the function of reverse transcriptase in retroviruses? a) It converts viral RNA into double-stranded DNA Ob) It uses viral RNA as a template for making complementary RNA strands Oc) It translates viral RNA into proteins d) It uses viral DNA as a template for RNA synthesisarrow_forwardResearchers have been determining the nucleotide sequences of variant forms of SARS-CoV-2, looking for versions of the virus that might be more easily transmitted between humans or that might be more deadly. (a) For example, one mutation in a viral gene changed a GAU codon to a GGU codon. How does this change affect the sequence of the polypeptide encoded by that gene? (b) In another variant form of the virus, a gene is missing six consecutive nucleotides. How would this change affect the sequence of the polypeptide encoded by that gene? (c) In another coronavirus variant, the spike protein (the prominent protein on the surface of the virus) contains a histidine residue where an aspartate (aspartic acid) residue should be. Describe a point mutation in the coronavirus genome that could have caused this change in the spike protein.arrow_forwardDouble-stranded RNA viruses, use the following polymerase for genome synthesis: A) viral RNA-dependent RNA polymerase. B) host cell DNA-dependent RNA polymerase. C) viral DNA-dependent DNA polymerase. D) host cell RNA-dependent RNA polymerase.arrow_forward
- For the mutations described below, categorize them in each of the following ways: [transition, transversion, insertion, or deletion]; [synonymous, missense, nonsense, frameshift, or regulatory]; [beneficial, deleterious, or neutral] a. A mutation in the SARS-CoV2 virus changes a codon in the gene encoding the spike protein from AAG to AAC. This mutation increases the ability of the virus to spread from person to person. b. Becker muscular dystrophy results in progressive wasting of skeletal and heart muscle tissue. A patient is found to have a mutation in the dystrophin gene (DMD) in the first nucleotide of intron 25. Normally, a G is in this position, but the patient has an A. c. Fur color in house cats is affected by several genes that encode pigment-producing enzymes. One such gene is found to have an additional C after position 45 in orange cats but not in black cats.arrow_forwardDraw a generic (+)RNA virus replication cycle. For viruses, (+) RNA indicates the genomic RNA can be translated directly. How would this differ from the system you drew in #1? Draw a generic (+) RNA virus replication cycle. Indicate which proteins need to be present for RNA replication and translation. Where would they act? Indicate what sequences or modifications would need to be present on the virus RNA for RNA replication and translation. How might a virus differentiate between RNA to be put into progeny virus particles and RNA to be translated into protein?arrow_forwardDoes the Hershey and Chase experiment rule out the possibility that RNA is the genetic material of T2 phage? Explain. If it does not, redesign the experiments of Hershey and Chase to distinguish between DNA and RNA in the T2 phage.arrow_forward
- Most humans are not easily infected by avian influenza. How, then, do DNA sequences from avian influenza become incorporated into human influenza?arrow_forwardOne of the reasons why phage therapy has not been applied widely is that bacteria can become resistant to bacteriophages as well, through mutations in genes encoding for specific proteins. What would be a protein in the bacterial cell that, if mutated, would make that cell resistant to phage infection?arrow_forwardAssume 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.arrow_forward
- M13 is a filamentous phage that infects the bacterium Escherichia coli. Infection with M13 is not lethal. However, the infection causes turbid plaques in E. coli because infected bacteria grow slower than the surrounding uninfected bacteria. This phage has been engineered to act as a vector system. Explain how the amplification of gene of interest works in this phage with illustration.arrow_forwardWhy adeno-associated virus (AAV) is widely used ?arrow_forwardThe RNA transcript of a region of T4 phage DNA contains the sequence 5’-AAAUGAGGA-3'. This sequence encodes three different polypeptides. What are they?arrow_forward
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