Prescott's Microbiology
11th Edition
ISBN: 9781260211887
Author: WILLEY, Sandman, Wood
Publisher: McGraw Hill
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Chapter 26, Problem 1AL
No temperate RNA phages have yet been discovered. How might this absence be explained?
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Most phages that use DNA to propagate work by hijacking host bacterial machinery including RNA Polymerase. Scientists found that treatment of jumbo bacteriophage PhiKZ with Rifampicin did not stop the phage from propagating. What is allowing for the survival of this phage?
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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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which type of phages can perform generalized transduction?arrow_forwardWhy must primary cell cultures be restarted every so often when preparing primary cell cultures to observe morphological changes caused by cells infected by a virus? Why are tumor cells preferred? Why are non-enveloped viruses generally more resistant to disinfectants than are enveloped viruses? A public health physician isolated large number of phages from rivers used as a source of drinking water in western Africa. They physician is very concerned that humans might become ill from drinking this water, although she knows that the phages specifically attack bacteria. Why is she concerned?arrow_forwardbriefly describe four explanations why E. coli phages can only infect E. coli cells, but not other bacteria or human cells.arrow_forward
- Why can transfer of DNA by conjugation cross genus lines, whereas transfer of DNA by natural transformation or phage transduction is usually limited to a few closely related organisms?arrow_forwardScientists at the SEA Phages lab were asked to find a phage that might infect a strain of M. abscessus that is infecting a young patient. Because the scientists did not have any phages known to infect M. abscessus, they first tested M. smeg phages that are also known to infect M. tuberculosis to see if they could infect this specific strain of M. abscessus. Why did they start with those phages? Select the best answer. O Phages that infect M. tuberculosis will also infect M. abscessus O The phages have already been FDA approved for use in phage therapy O Phages that infect two different hosts have a broader host range and are more likely to be able to infect a third host (such as M. abcessus) O The phages are lytic, which makes them good candidates for phage therapy O More information is known about the genomes of these phages than other phagesarrow_forwardCan phages kill humans?arrow_forward
- According to Philip Bell’s viral eukaryogenesis hypothesis, genes for DNA replication, RNA transcription, protein translation, and histone proteins were all provided by: an endosymbiotic gram-negative eubacterium an endosymbiotic archaeobacterium a gram-positive eubacterial host cell a double-stranded DNA virus an archaeobacterial host cellarrow_forwardIn order to determine the genetic material of a T2 phage, Alfred Hershey and Martha Chase conducted experiments using T2 phages that infected bacteria. In one treatment, they grew phages with radioactive sulfur. In another treatment, they grew phages with radioactive phosphorous. They allowed both types of phages to infect bacterial cells. After infection, they found that only bacteria infected with phages grown with radioactive phosphorous showed any radioactivity. Why did they use radioactive sulfur and phosphorous for this experiment? * O Sulfur is part of the DNA molecule but not part of a protein molecule. Sulfur and phosphorous are some of the most reactive molecules and are easily traced. Sulfur and phosphorous are able to survive the centrifuge, a crucial component of the experiment. O Phosphorous is part of the DNA molecule but not part of a protein molecule.arrow_forwardAre phages alive?arrow_forward
- Bacterial conjugation has medical consequences. For example, certain plasmids contain genes that code for toxins. The causative agent of a deadly form of food poisoning, E. coli 0157, synthesizes a toxin that causes massive bloody diarrhea and kidney failure. This toxin is now believed to have originated in Shigella, another bacterium that causes dysentery. Similarly, the growing problem of antibiotic resistance is partly attributable to the spread of antibioticresistant genes among bacterial populations. Antibiotic resistance develops because antibiotics are overused in medical practice and in livestock feeds. Suggest a mechanism by which this extensive use promotes antibiotic resistance.arrow_forwardWhen bacteriophage P1 causes E. coli to lyse, the resulting materialis called a P1 lysate. What type of genetic material would befound in most of the P1 phages in the lysate? What kind of geneticmaterial is occasionally found within a P1 phage?arrow_forwardWhy do most viruses that infect bacteria have tails, whereas most viruses that infect animals and plants do not?arrow_forward
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