Prescott's Microbiology
11th Edition
ISBN: 9781260211887
Author: WILLEY, Sandman, Wood
Publisher: McGraw Hill
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Chapter 26.4, Problem 1CC
The rotavirus genome encodes 12 proteins. Suggest one strategies it might use to ensure that all are synthesized.
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In 1944, Avery, Macleod, and McCarty provided strong evidence that DNA is the hereditary material in Streptococcus pneumoniae by
Group of answer choices
showing that avirulent cells could become virulent by the process of transduction
none of these is true.
showing that virulent cells could become avirulent if the DNA was destroyed after transformation
showing that avirulent cells could not gain the ability to become virulent cells if conjugation was interrupted.
showing that avirulent cells could not gain the ability to become virulent if DNA was destroyed after transformation.
The figure below shows the life cycle of the fungus Neurospora. The adult stage of the Neurospora is a multicellular haploid.
b) Neurospora has an arginine amino acid synthesis pathway shown below. Suppose I take the strain above that only grows with arginine supplements and cross it to a different mutant Neurospora strain that grows with arginine and citrulline supplements but not with ornithine supplements. Assuming gens A, B, and C are unlinked and there is only one mutation per stain:
What percentage of the progeny will grow on ornithine?
What percentage on citrulline?
What percentage on arginine?
Give three reasons why Salmonella strains are very useful for mutagenesis studies.
Chapter 26 Solutions
Prescott's Microbiology
Ch. 26.1 - List some characteristics used in classifying...Ch. 26.1 - Prob. 2CCCh. 26.2 - Prob. 1MICh. 26.2 - Why do you think T4 evolved to initiate DNA...Ch. 26.2 - What function does HMC glycosylation serve?Ch. 26.2 - Explain why the T4 genome is circularly permuted.Ch. 26.2 - Prob. 1.2CCCh. 26.2 - How is a prophage induced to become active again?Ch. 26.2 - Describe the roles of cII, CIII, repressor (CI),...Ch. 26.2 - How do the temperate phages Mu and P1 differ from...
Ch. 26.2 - How is the envelope of this virus formed? How does...Ch. 26.2 - Why do cold sores recur throughout the lifetime of...Ch. 26.2 - In what part of the host cell does a herpesvirus...Ch. 26.2 - Many small DNA viruses rely on host enzymes for...Ch. 26.3 - Why is the X174 genome considered plus stranded?Ch. 26.3 - Why is it necessary for some ssDNA viruses to...Ch. 26.3 - Prob. 2CCCh. 26.3 - How do parvoviruses trick the host DNA polymerase...Ch. 26.4 - The rotavirus genome encodes 12 proteins. Suggest...Ch. 26.4 - Describe the life cycle of 6 phage. What makes...Ch. 26.4 - Prob. 3CCCh. 26.4 - In what ways are the life cycles of 6 and...Ch. 26.5 - Where in the host does the plus-strand RNA genome...Ch. 26.5 - How do some plus-strand viruses use polyproteins...Ch. 26.5 - What is an IRES? Why is it important?Ch. 26.5 - Prob. 3CCCh. 26.6 - How does that use of a segmented genome by...Ch. 26.6 - Prob. 2CCCh. 26.7 - Prob. 1MICh. 26.7 - Prob. 1CCCh. 26.7 - Prob. 2CCCh. 26.7 - Prob. 3CCCh. 26.8 - Prob. 1CCCh. 26.8 - Trace the HBV multiplication cycle, paying...Ch. 26 - Prob. 1RCCh. 26 - Prob. 2RCCh. 26 - Prob. 3RCCh. 26 - Prob. 4RCCh. 26 - No temperate RNA phages have yet been discovered....Ch. 26 - The choice between lysogeny and lysis is...Ch. 26 - Prob. 3ALCh. 26 - You are studying RNA viruses and have discovered a...Ch. 26 - Prob. 5ALCh. 26 - Prob. 6AL
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- The Pfizer Covid-19 vaccine is one of the vaccines currently being rolled out for mass vaccination in South Africa to protect the population against SARS CoV-2, and the active compound in this vaccine is an mRNA molecule. a) The starting material for productio of this vaccine is a copy of the coronavirus spike protein gene cloned into a ppasmid. List the main experimental steps in the vaccine production process, to go from a plamid to an mRNA molecule. b) Which molecular processes in the cell will allow an injected strand of mRNA to produce anti-Covid immunity in the vaccine recipient?arrow_forwardpresent the chemical mechanism of the HIV protease. Discuss the mode of action of some inhibitors of this enzyme.arrow_forwardDiscuss the genetic switch that controls the lytic versus lysogenic path in bacteriophage lambda.arrow_forward
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- Describe how you would genetically design a superbugresistant to b-lactams, methicillin, streptomycin, daptomycin,and trimethoprimarrow_forwardExplain: Describe an electrochemical sensor assay method for rapid bacterial detection and identification. What are the principles and mechanisms involved? functionalization of a sensor array with DNA oligonucleotide capture probes for ribosomal RNA (rRNA) species-specific sequences. sandwich hybridization of target rRNA with the capture probe and a horseradish peroxidase linked DNA oligonucleotide detector probe. Explain how bacteria are being detected using an electrochemical sensorarrow_forwardChoose the statement below that is true about the characteristics of the bacterial fertility factor factor. The fertility factor carries genes responsible for uptake of naked DNA, and has several IS elements to assist plasmid integration into host cell's chromosome. O The fertility factor carries genes responsible for formation of bacteriophages, and has several IS elements to assist plasmid transfer through the sex pilus. The fertlity factor carries genes responsible for formation of sex pili, and has several IS elements to assist plasmid integration into host cell's chromosome. The fertility factor carries genes responsible for formation of sex pili, and has several IS elements to assist plasmid transfer through the sex pilus.arrow_forward
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