Concepts of Genetics (11th Edition)
11th Edition
ISBN: 9780321948915
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino
Publisher: PEARSON
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Chapter 6, Problem 17PDQ
A phage-infected bacterial culture was subjected to a series of dilutions, and a plaque assay was performed in each case, with the results shown in the following table. What conclusion can be drawn in the case of each dilution, assuming that 0.1 mL was used in each plaque assay?
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Chapter 6 Solutions
Concepts of Genetics (11th 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 - Prob. 1CSCh. 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 - Prob. 13PDQCh. 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. 24ESPCh. 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...Ch. 6 - Prob. 31ESP
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- Bacterial mutants can be classified on the basis of the method, Which is those methods?arrow_forwardYou are tasked with cultivating the following microorganisms:A recombinant strain of E. coliA wild strain of Streptomyces clavuligerus• Suggest a storage method for each microorganism and justify your choice. You have at your disposal a refrigerator and an ultrafreezer, in addition to materials and conditions for handling microorganisms.• Propose a culture medium for each (choose a complex medium for one organism and a synthetic medium for the other)As a complement of nutrients, they must be indicated on the following scale: +++ : above 5 g/L++ : from 1 to 5 g/L+ : below 1 g/L• Describe the procedure for preparing and sterilizing the components of the culture media for a volume of 5.0 L• Make a bench process selection scheme, up to the step of selecting a benchtop reactor 5 L.arrow_forwardThe strain of λ phage t is cI857. That tells you that the cI DNA segment is disabled by a specific mutation. What is the exact genetic change in cI857? What specific property of the cI gene product does this mutation change, and how does this help titering for a plaque assay?arrow_forward
- In the bacterial transformation experiment, what is the primary purpose of using an ampicillin-containing medium? LB agar is __________.arrow_forwardWhat is an advantage of using an ELISA instead of a protein microarray to study a proteome? What is a disadvantage?arrow_forwardWhat is the purpose of conducting a modified Furter-Meyer Test? What is the principle behind this test? How could you identify the positive result for this test?arrow_forward
- In the plaque assay, exactly what makes up a single plaque?arrow_forwardAt what stage of the culture should bacterial colonies be harvested for plasmid DNA extraction? How about for genomic DNA extraction? What distinguishes the xanthogenate-based methodology from the traditional phenol/chloroform method for isolating DNA from bacteria? What makes potassium ethyl xanthogenate efficient in isolating DNA from a variety of microorganisms?arrow_forwardAn E. coli colony grew on minimal medium supplemented with arginine and leucine. However, bacteria from this colony are unable to grow and form colonies on minimal medium supplemented with arginine and methionine. What is the genotype of the bacteria in this E. coli colony?arrow_forward
- What would you conclude if you examined a Kirby –Bauer assay and found individual colonies of the plated microbe growing within the zone of inhibition?arrow_forwardWhat is an ONPG test? WHat is he principle behind this assay.arrow_forwardA plaque assay is performed beginning with 1 mL of a solution containing bacteriophages. This solution is serially diluted 4 times by combining 0.1 mL of each sequential dilution with 9.9 mL of liquid medium. Then 0.1 mL of the final dilution is plated in the plaque assay and yields 21 plaques. What is the initial density of bacteriophages in the original 1 mL? Recall that initial phage density = (plaque number/mL) ×× (dilution factor).arrow_forward
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