Prescott's Microbiology
10th Edition
ISBN: 9781259281594
Author: Joanne Willey, Linda Sherwood Adjunt Professor Lecturer, Christopher J. Woolverton Professor
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 17.3, Problem 2MI
What would you conclude if you obtained only blue colonies after cloning into a vector that enables blue/white screening of transformants? Why might such a result occur?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
After mutagenesis of wild type Vibrio fisheri, you isolate two different mutant strains (A and B) that, unlike the wild type cells, fail to luminesce when grown to high density in a flask with appropriate medium. Curiously, however, when you inoculate both mutant strains in the same flask, you observe that the mixed (A+B) culture begins to emit light after growing dense.
a) What gene/functions are likely affected in each of the two mutants?
b) How does this explain their phenotypes?
Assume you have successfully cloned a small (200 bp) fragment of DNA into the polylinker region of a pUC18 cloning vector. Describe the appearance of transformed colonies you would expect to see on each of the following plates: plain media, media containing ampicillin, media containing tetracycline, media containing ampicillin and X-Gal.
Taxol is a compound used in cancer treatment. You are working for Genentech on a project to optimize the production of taxol purified from recombinant E. coli bacteria. You have two new strains of SuperGro E. coli: Strain A and Strain B, that you have engineered to express taxol. You want to know which of the two SuperGro E. coli strains is better to use for purifying taxol based on the amount you purify (measured by final concentration of protein in mg/mL). You also want to know which growth media (LB Media or SOC Media) results in a higher amount of purified taxol. You collect data and plot the average final concentration of taxol from each experimental condition in the graph below.
Use the approach we discussed in class and write your analysis and interpretation of the data (describe the graph, describe the data, and interpret the data). Make sure to give clear and complete descriptions.
A. Describe the graph:
B. Describe the data:
C. Describe the interpretation:
Chapter 17 Solutions
Prescott's Microbiology
Ch. 17.1 - Examine the uncut piece of DNA shown in the upper...Ch. 17.1 - Which of the above enzymes yield blunt ends? Which...Ch. 17.1 - Why might two DNA fragments inadvertently be...Ch. 17.1 - Why must introns be removed from eukaryotic DNA...Ch. 17.1 - If a linear piece of DNA is cut with a restriction...Ch. 17.1 - Describe restriction enzymes, sticky ends, and...Ch. 17.1 - What is cDNA? Why is it necessary to generate cDNA...Ch. 17.1 - You want to visualize a digested plasmid that...Ch. 17.1 - What is the purpose of Southern blotting? How is a...Ch. 17.2 - Why, after three cycles, are the vast majority of...
Ch. 17.3 - Which plasmid is a shuttle vector? Why?Ch. 17.3 - What would you conclude if you obtained only blue...Ch. 17.3 - In what ways does the BAC shown here differ from...Ch. 17.3 - Briefly describe the polymerase chain reaction....Ch. 17.3 - Why is PCR used to detect infectious agents that...Ch. 17.3 - How would you use PCR to measure the concentration...Ch. 17.3 - Why is it possible to visualize a PCR product on...Ch. 17.3 - You want to clone a 6,000 bp DNA fragment in E...Ch. 17.5 - Why are long fragments (e.g., 20,000 bp) of...Ch. 17.6 - What special considerations are necessary if one...Ch. 17.6 - Prob. 1RIACh. 17.6 - Explain the selection for antibiotic resistance...Ch. 17.6 - Prob. 3RIACh. 17.6 - Prob. 4RIACh. 17.6 - Prob. 5RIACh. 17.6 - You are studying chemotaxis proteins in a newly...Ch. 17 - Which of the DNA molecules shown are recombinant?Ch. 17 - You are performing a PCR to amplify a gene...Ch. 17 - Prob. 2CHICh. 17 - Suppose you transformed a plasmid vector carrying...Ch. 17 - You are interested in the activity and regulation...Ch. 17 - Prob. 5CHICh. 17 - Zymomonas mobilis is a Gram-negative bacterium...
Knowledge Booster
Learn more about
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
- You are engineering a new vector that contains a screenable marker that can be used for blue/white screening of successful clones. For each site (1, 2, and 3) on the cloning vector below, describe why it would or would not be a good place for you to put the polylinker to facilitate blue/white screening. You can assume that the polylinker itself will not interfere with coding sequence in that region. In other words, the polylinker length will be a multiple of 3 nucleotides, will not contain a stop codon, and any amino acids translated will not affect the activity of the protein in that region. The arrows indicate the direction of transcription for the gene. Note from student:As stated in the problem... "YOU CAN ASSUME THAT THE POLYLINKER ITSELF WILL NOT INTERFERE WITH CODING SEQUENCE IN THAT REGION. IN OTHER WORDS, THE POLYLINKER LENGTH WILL BE A MULTIPLE OF 3 NUCLEOTIDES, WILL NOT CONTAIN A STOP CODON, AND ANY AMINO ACIDS TRANSLATED WILL NOT AFFECT THE ACTIVITY OF THE PROTEIN IN THAT…arrow_forwardYou are engineering a new vector that contains a screenable marker that can be used for blue/white screening of successful clones. For each site (1, 2, and 3) on the cloning vector below, describe why it would or would not be a good place for you to put the polylinker to facilitate blue/white screening. You can assume that the polylinker itself will not interfere with coding sequence in that region. In other words, the polylinker length will be a multiple of 3 nucleotides, will not contain a stop codon, and any amino acids translated will not affect the activity of the protein in that region. The arrows indicate the direction of transcription for the gene.arrow_forwardThe temperature at which the primers and target DNA hybridize may be changed to influence the stringency of PCR amplification. What effect will changing the hybridization temperature have on the amplification? Let's say you have a certain yeast gene A and want to check whether it has a human equivalent. How might managing the hybridization's rigor benefit you?arrow_forward
- Consider the following experiment. First, large populations of two mutant strains of Escherichia coli are mixed, each requiring a different, single amino acid. After plating them onto a minimal medium, 45 colonies grew. Which of the following may explain this result? A) The colonies may be due to back mutation (reversion). B) The colonies may be due to recombination. C) Either A or B is possible. D) Neither A nor B is possible.arrow_forwardTransposon mutagenesis was used to generate a library of mutants within the Salmonella genome. You are trying to identify a colony with the transposon inserted in the pathogenic related gene SPI-1 using PCR. Forward and reverse primers are generated that flank either side of the gene and yield a wild type product that is 900 bases in length. Which of the colonies sampled in the gel would you expect to contain the SPI-1 gene with transposon insertion? 3,000 2,000 1,000 700 500 300 100 Ladder Colony A Colony B Colony C Colony D Colony E none colonies A&C colonies B&E O colonies A, C, &D colonies B, D, &E -arrow_forwardAs you are performing this protocol, you realize that the ultraviolet (UV) light does not work as expected, because of a fused bulb. You decide to look at plate #4 (NA with AMP; pGFP added to cells) under visible light to decide whether transformation was successful or not. Will viewing this plate under visible light tell you whether you were successful in transforming cells with pGFP DNA?arrow_forward
- After transformation you were asked to grow bacterial cells transformed with plasmid on a plate that had X-gal and ampicillin. X-Gal is often used as in indicator dye, which turns blue when metabolized by B-galactosidase protein and used to test if cloning experiments have worked. [Note look at the vector diagrams carefully] Briefly explain how you would find the bacterial cells that are transformed with the plasmid with the YFG inserted.arrow_forwardIt is desired to isolate genomic DNA from liquid culture of S. cerevisiae yeast. A commercial kit will be used to isolate genomic DNA from this liquid culture. Answer the following questions to understand the strategy used by commercial kits for genomic DNA isolation. a) List all the steps from cell pellet preparation to DNA elution. b) With which feature can the membrane in the column that comes with the commercial kit bind DNA? c) Which component in the kit would you use to recover the DNA from the membrane of the column to which the DNA was attached?arrow_forwardA person with a rare genetic disease has a sample of her chromosomessubjected to in situ hybridization using a probe that is known to recognize band p11 on chromosome 7. Even though her chromosomes look cytologically normal, the probe does not bind to this person’s chromosomes. How would you explain these results? How would you use this information to positionally clone the gene that is related to this disease?arrow_forward
- A selectable marker is used in the section of recombinants on the basis of their ability to produce colour in presence of chromogenic substrate.(a) Mention the name of mechanism involved.(b) Which enzyme is involved in production of colour?(c) How is it advantageous over using antibiotic resistant gene as a selectable marker?arrow_forwardDescribe the outcome of a chain-terminator sequencing procedure in which (a) too little ddNTP is added or (b) too much ddNTP is added.arrow_forwardAlthough a number of different animals have been successfully cloned, the process of creating cloned animals is very inefficient. Typically, only about 0.1% to 3% of attempts result in a live-born animal. What might be some of the reasons for this low rate of success?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSON
Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax
Anatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Anatomy & Physiology
Biology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:9780815344322
Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:9781260159363
Author:Martin, Terry R., Prentice-craver, Cynthia
Publisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Biology
ISBN:9781260231700
Author:Sylvia S. Mader, Michael Windelspecht
Publisher:McGraw Hill Education
Molecular Techniques: Basic Concepts; Author: Dr. A's Clinical Lab Videos;https://www.youtube.com/watch?v=7HFHZy8h6z0;License: Standard Youtube License