Concepts of Genetics (12th Edition)
12th Edition
ISBN: 9780134604718
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino, Darrell Killian
Publisher: PEARSON
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Chapter 6, Problem 15PDQ
If a single bacteriophage infects one E. coli cell present on a lawn of bacteria and, upon lysis, yields 200 viable viruses, how many phages will exist in a single plaque if three more lytic cycles occur?
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If a single bacteriophage infects one E. coli cell present in a cultureof bacteria and, upon lysis, yields 200 viable viruses, howmany phages will exist in a single plaque if three more lytic cyclesoccur?
1 mL of a bacteriophage suspension is mixed with 20 mL of a bacterial culture and 50% of the phages adsorb. We know that the bacteriophage suspension had a concentration of 1x1010 viruses per mL, and the bacterial culture had a concentration of 3x108 bacteria per mL.
What fraction of the cells is multiple infected?
One mL of a bacteriophage suspension is mixed with 20 mL of a bacterialculture and 50% of the phages adsorb. We know that the bacteriophagesuspension had a concentration of 1x10^10 viruses per mL, and the bacterialculture had a concentration of 3x10^8 bacteria per mL.
What fraction of the cells is single infected?
Chapter 6 Solutions
Concepts of Genetics (12th Edition)
Ch. 6 - When the interrupted mating technique was used...Ch. 6 - In a transformation experiment involving a...Ch. 6 - In complementation studies of the rII locus of...Ch. 6 - A 4-month-old infant had been running a moderate...Ch. 6 - Prob. 2CSCh. 6 - Prob. 3CSCh. 6 - Prob. 4CSCh. 6 - HOW DO WE KNOW? In this chapter, we have focused...Ch. 6 - Review the Chapter Concepts list on p. 123. Many...Ch. 6 - With respect to F+ and F bacterial matings, answer...
Ch. 6 - List all major differences between (a) the F+ F...Ch. 6 - Describe the basis for chromosome mapping in the...Ch. 6 - In general, when recombination experiments are...Ch. 6 - Why are the recombinants produced from an Hfr F...Ch. 6 - Describe the origin of F bacteria and merozygotes.Ch. 6 - In a transformation experiment, donor DNA was...Ch. 6 - Describe the role of heteroduplex formation during...Ch. 6 - Explain the observations that led Zinder and...Ch. 6 - Prob. 12PDQCh. 6 - Two theoretical genetic strains of a virus (abc...Ch. 6 - The bacteriophage genome consists of many genes...Ch. 6 - If a single bacteriophage infects one E. coli cell...Ch. 6 - A phage-infected bacterial culture was subjected...Ch. 6 - In recombination studies of the rII locus in phage...Ch. 6 - In an analysis of rII mutants, complementation...Ch. 6 - If further testing of the mutations in Problem 18...Ch. 6 - Using mutants 2 and 3 from Problem 19, following...Ch. 6 - During the analysis of seven rII mutations in...Ch. 6 - In studies of recombination between mutants 1 and...Ch. 6 - Prob. 23ESPCh. 6 - An Hfr strain is used to map three genes in an...Ch. 6 - A plaque assay is performed beginning with 1 mL of...Ch. 6 - In a cotransformation experiment, using various...Ch. 6 - For the experiment in Problem 26, another gene, g,...Ch. 6 - Bacterial conjugation, mediated mainly by...Ch. 6 - A study was conducted in an attempt to determine...
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- One mL of a bacteriophage suspension is mixed with 20 mL of a bacterialculture and 50% of the phages adsorb. We know that the bacteriophagesuspension had a concentration of 1x10^10 viruses per mL, and the bacterialculture had a concentration of 3x10^8 bacteria per mL. What fraction of the cells is uninfected?arrow_forwardHow many bacteriophage particles were isolated from a single plaque? Howmany different strains of phage would be present?arrow_forwardIn a petri dish with solidified agar with escherichia coli, enterobacter aerogenes and staphylococcus aureus, you streak a loopfull of lytic T4-phage in a single line onto the center of the the dish, how do you know if bacteriophage infected the bacteria. why didn't the bacteriophage infect all 3 bacteria?arrow_forward
- Describe in general terms how bacteriophage lambda regulates the switch between lytic and lysogenic cyclesarrow_forwardOne mL of a bacteriophage suspension is mixed with 20 mL of a bacterialculture and 50% of the phages adsorb. We know that the bacteriophagesuspension had a concentration of 1x10^10 viruses per mL, and the bacterialculture had a concentration of 3x10^8 bacteria per mL. How many viruses are adsorbed per cell (multiplicity of infection)?arrow_forwardWhat enzyme is responsible for the production of viral DNA from a retrovirus?arrow_forward
- When 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_forwardIf a single bacteriophage infects one E. coli cell present on a lawn of bacteria and, upon lysis, yields 185 viable viruses, how many phages will exist in a single plaque if 5 more lytic cycles occur? Express your answer using three significant figures (example: 1.11×10^3).arrow_forwardWhy are prokaryotes able to replicate so much more quickly than eukaryotes? What cellular components must be copied before a cell splits in two? Why is this difference in replication rate an important part of our vulnerability to bacterial pathogens?arrow_forward
- You are studying your favorite (hypothetical) bacteriophage named M277. It infects E. coli and stays dormant within the bacterial cell. How does a phage become dormant within a cell? Generally, describe the steps of infection by phage in this scenarioarrow_forwardWhy do bacterial viruses often inject their DNA directly into the cell?arrow_forwardDraw and label the E. coli host cell/T4 bacteriophage interaction.?arrow_forward
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What Is A Virus ? ; Author: Peekaboo Kidz;https://www.youtube.com/watch?v=YS7vsBgWszI;License: Standard YouTube License, CC-BY