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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Textbook Question
Chapter 22, Problem 4PDQ
Why are most recombinant human proteins produced in animal or plant hosts instead of bacterial host cells?
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Students have asked these similar questions
In E. coli, the genes for histidine (his), arginine (arg), tyrosine (tyr), and valine (val) synthesis are closely linked. A wild-type strain is used as a donor for transducing viruses. Various recipient strains were treated with these viruses. Wild-type recombinant colonies were then counted, with the results shown in the following table.
Genotype of recipient
Number of wild-type colonies
Genotype of recipient
Number of wild-type colonies
his- arg+ val+ tyr+
254
his+ arg- val- tyr+
132
his+ arg+ val- tyr-
36
his+ arg- val+ tyr+
240
his- arg- val+ tyr+
28
his- arg+ val- tyr+
102
his- arg+ val+ tyr-
100
his+ arg- val+ tyr-
2
What is the cotransduction coefficient of histidine and valine? For consistency, standardize on histidine.
0.38 (wrong)
0.537
0.402
None of these
What is a recombinant vector? How is a recombinant vector constructed? Explain how X-Gal is used in a method of identifying recombinant vectors that contain segments of chromosomal DNA.
What is the difference between a recombinant protein and a native protein? Why is it that some amount of expressions of recombinant protein are toxic compared to the same amounts of native proteins?
Chapter 22 Solutions
Concepts of Genetics (11th Edition)
Ch. 22 - In order to vaccinate people against diseases by...Ch. 22 - Prob. 2NSTCh. 22 - Prob. 3NSTCh. 22 - Prob. 1CSCh. 22 - Prob. 2CSCh. 22 - Prob. 3CSCh. 22 -
HOW DO WE KNOW?
In this chapter, we focused on a...Ch. 22 -
Review the Chapter Concepts list on page 569....Ch. 22 - Prob. 3PDQCh. 22 - Why are most recombinant human proteins produced...
Ch. 22 - Prob. 5PDQCh. 22 - One of the major causes of sickness, death, and...Ch. 22 - Describe how the team from the J. Craig Venter...Ch. 22 - Prob. 8PDQCh. 22 - Prob. 9PDQCh. 22 - Prob. 10PDQCh. 22 - As genetic testing becomes widespread, medical...Ch. 22 - Prob. 12PDQCh. 22 - Prob. 13PDQCh. 22 - What is the main purpose of genome-wide...Ch. 22 - Prob. 15PDQCh. 22 - Dominant mutations can be categorized according to...Ch. 22 - In 2013 the actress Angelina Jolie elected to have...Ch. 22 - Prob. 18PDQCh. 22 - Should the FDA regulate direct-to-consumer genetic...Ch. 22 - Prob. 20ESPCh. 22 - Following the tragic shooting of 20 children at a...Ch. 22 - Private companies are offering personal DNA...Ch. 22 - Prob. 23ESPCh. 22 - Prob. 24ESPCh. 22 - Prob. 25ESPCh. 22 - Prob. 26ESP
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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
- 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_forwardAre they true or false? a)If someone reads an absorbance of 0,25 at 260 nm, the concentration of the dsDNA is 25 ug/ml. b)If someone reads an absorbance of 0,25 at 260 nm, the concentration of the dsDNA is 25 ug/ml c)The copy number refers to the number of molecules of an individual plasmid that are normally found in a single bacterial cell. d)The amount of mRNA level can be determined via competitor RT-PCR in which two different sized products can be obtained, one of which is a known standard.arrow_forwardWhich of the following pieces of information about our recombinant DHFR protein do you predict to obtain from Western Blot analysis? A) Protein size B) Protein sequence C) Protein functionarrow_forward
- We have two specific strains of E. coli that have shown horizontal gene transfer (HGT) when mixed. To experimentally determine the method of HGT that is happening, the following conditions are set up in different tubes of culture media: A) Donor and recipient strain mixed together (control - no treatment). B) Donor and recipient strains mixed together, DNase added (can digest DNA in solution, not within cells).C) Special tube containing a membrane filter (with pores that allow DNA and viruses to pass through, but not bacterial cells) that separates two compartments. Donor strain is added on one side, the recipient strain on the other (they are separated by the filter).D) Donor and recipient strains mixed together, with chemical that inactivates viruses (chemical affects bacteriophages in solution so they are unable to attach to cells). The results: Tubes A, B, and D: HGT was observed. Tube C: HGT was NOT observed. Based on this, which type of HGT was occurring? Conjugation,…arrow_forwardConsider three genes in E. coli: thr+, ara+, and leu+ (which give the cell the ability to synthesize threonine, arabinose, and leucine, respectively). All three of these genes are close together on the E. coli chromosome. Phages are grown in a thr+ ara+ leu+ strain of bacteria (the donor strain). The phage lysate is collected and used to infect a strain of bacteria that is thr− ara− leu −. The recipient bacteria are then tested on selective medium lacking leucine. Bacteria that grow and form colonies on this medium (leu+ transductants) are then replica-plated on medium lacking threonine and on medium lacking arabinose to see which are thr+ and which are ara+. Another group of the recipient bacteria are tested on medium lackingthreonine. Bacteria that grow and form colonies on this medium (thr+ transductants) are then replica-plated on medium lacking leucine and onto medium lacking arabinose to see which are ara+ and which are leu+. Results from these experiments are as follows:…arrow_forwardWhy are the recombinantDNA technology and thenucleus transplantationtechnology still dangerous?arrow_forward
- How can one prevent recombinant DNA from undergoing recombination in a bacterial host cell?arrow_forwardHigh Frequency Recombination results in which of the following? O 1) Plasmid DNA incorporated into the cell 2) Genomic DNA incorporated into the cell 3) Viral DNA incorporated into the cell 4) Plasmid and genomic DNA from the donor cell is incorporated into the recipient cell's genome 5) The movement of genes within the cell through homologous recombinationarrow_forwardDNA from a strain of bacteria with genotype a+ b+ c+ d+ e+ was isolated and used to transform a strain of bacteria that was a− b− c− d− e−. The transformants were tested for the presence of donated genes. The following genes were cotransformed: a+ and d+ b+ and e+ c+ and d+ c+ and e+ What is the order of genes a, b, c, d, and e on the bacterial chromosome?arrow_forward
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genetic recombination strategies of bacteria CONJUGATION, TRANSDUCTION AND TRANSFORMATION; Author: Scientist Cindy;https://www.youtube.com/watch?v=_Va8FZJEl9A;License: Standard youtube license