Brock Biology of Microorganisms (15th Edition)
15th Edition
ISBN: 9780134261928
Author: Michael T. Madigan, Kelly S. Bender, Daniel H. Buckley, W. Matthew Sattley, David A. Stahl
Publisher: PEARSON
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Chapter 12.4, Problem 1CR
What does site-directed mutagenesis allow you to do that normal mutagenesis does not?
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What does site-directed mutagenesis allow you to dothat normal mutagenesis does not?
Describe three possible uses of site-directed mutagenesis.
How does a mutagen induce mutation ?explain with examples?
Chapter 12 Solutions
Brock Biology of Microorganisms (15th Edition)
Ch. 12.1 - Why is a primer needed at each end of the DNA...Ch. 12.1 - How does RT-PCR differ from traditional PCR?Ch. 12.1 - Prob. 3MQCh. 12.1 - Describe the basic principles of gene...Ch. 12.2 - What is the purpose of molecular cloning?Ch. 12.2 - Prob. 2MQCh. 12.2 - Prob. 3MQCh. 12.2 - Prob. 1CRCh. 12.3 - How can the bacteriophage T7 promoter be used to...Ch. 12.3 - What major advantage does cloning mammalian genes...
Ch. 12.3 - Prob. 3MQCh. 12.3 - Prob. 1CRCh. 12.4 - How can site-directed mutagenesis be useful to...Ch. 12.4 - What is used to alter more than a few base pairs...Ch. 12.4 - What are knockout mutations?Ch. 12.4 - What does site-directed mutagenesis allow you to...Ch. 12.5 - What is a reporter gene? The product of which...Ch. 12.5 - Prob. 2MQCh. 12.5 - Describe two widely used reporter genes.Ch. 12.6 - Prob. 1MQCh. 12.6 - Prob. 2MQCh. 12.6 - Prob. 3MQCh. 12.6 - Prob. 1CRCh. 12.7 - Prob. 1MQCh. 12.7 - Give an example of a genetically modified plant...Ch. 12.7 - How have transgenic salmon been engineered to...Ch. 12.7 - What is the Ti plasmid and how has it been of use...Ch. 12.8 - Explain why recombinant vaccines might be safer...Ch. 12.8 - Prob. 2MQCh. 12.8 - Prob. 3MQCh. 12.8 - What is a subunit vaccine and why are subunit...Ch. 12.9 - Explain why metagenomic cloning gives large...Ch. 12.9 - What types of environments are often sampled to...Ch. 12.9 - Prob. 3MQCh. 12.9 - How has metagenomics been used to find novel...Ch. 12.10 - How has Caldicellulosiruptor been modified to...Ch. 12.10 - Prob. 2MQCh. 12.10 - What has been the limiting factor in engineering...Ch. 12.10 - Prob. 1CRCh. 12.11 - What are biobricks?Ch. 12.11 - Prob. 2MQCh. 12.11 - How was Escherichia coli modified to produce a...Ch. 12.11 - Prob. 1CRCh. 12.12 - Prob. 1MQCh. 12.12 - Prob. 2MQCh. 12.12 - How is recombinant DNA inserted into a genome...Ch. 12.12 - How has the CRISPR editing technology been applied...Ch. 12.13 - Prob. 1MQCh. 12.13 - How can a tRNA be engineered to encode for a...Ch. 12.13 - Prob. 3MQCh. 12.13 - What are some mechanisms for controlling a...Ch. 12 - Suppose you have just determined the DNA base...Ch. 12 - Prob. 2AQCh. 12 - Prob. 3AQCh. 12 - Describe how you could recode Escherichia coli to...
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- What is a mutagen?arrow_forwardWhat is the difference between nonhomologous end-joining (NHEJ) and homology-directed repair (HDR) in the context of genome editing?arrow_forwardAs we described in class, in the early 1960's Francis Crick and colleagues set out to determine how many nucleotide bases make up a codon, before it was possible to sequence DNA and before Nirenberg and his colleagues solved the genetic code. To do this, they used a chemical mutagen that they knew made single nucleotide changes, used this mutagen to conduct a screen for mutations that disrupted a particular gene, and collected a number of different mutations in this gene. Briefly describe the logic they used to deduce that the codon length is 3 nucleotides long.arrow_forward
- Why do adult human cells (other than germ cells and stem cells) NOT express the enzyme telomerase? In other words what benefit does not having telomerase provide to these cells?arrow_forwardWhat is a mutagen? Describe a point mutation, structuralmutation, and nondisjunctionarrow_forwardHow do we know that many cancer-causing agents (carcinogens)are also mutagenic?arrow_forward
- Earlier, we described the Lederbergs’experiment, which demonstrated thatmutations are not directed by the environment. But mutagens, which areenvironmental, can lead to mutations. What’s the difference?arrow_forwardA chemist synthesizes four new chemical compounds in the laboratory and names them PFI1, PFI2, PFI3, and PFI4. He gives the PFI compounds to a geneticist friend and asks her to determine their mutagenic potential. The geneticist finds that all four are highly mutagenic. She also tests the capacity of mutations produced by the PFI compounds to be reversed by other known mutagens and obtains the following results. What conclusions can you make about the nature of the mutations produced by these compounds? Reversed by Mutations, Nitrous, Aminopurine acid Acridine orange 2- produced by Hydroxylamine PFI1 Yes Yes Some No PFI2 No No No No PFI3 Yes Yes No No PFI4 No No No Yesarrow_forwardGeneticists often use the alkylating agent ethylmethane sulfonate (EMS; see Figure 15.6) to induce mutations in Drosophila. Why is EMS a mutagen of choice for genetic research? What would be the effects of EMS in a strain of Drosophila lacking functional mismatch repair systems?arrow_forward
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