Microbiology: An Introduction (13th Edition)
13th Edition
ISBN: 9780134605180
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case, Derek Weber, Warner Bair
Publisher: PEARSON
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Chapter 9, Problem 8R
You are attempting to insert a gene for saltwater tolerance into a plant by using the Ti plasmid. In addition to the desired gene, you add a gene for tetracycline resistance (tetR) to the plasmid. What is the purpose of the tetR gene?
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Why is it important to include a selective marker gene on a plasmid?
a) So that you can select cells containing the plasmid after transformation.
b) So that you can select where the plasmid inserts into the genome.
c) So that you can select the recombinant gene you want to add to the plasmid.
d) So that you can select when the recombinant gene on your plasmid is
expressed.
Why is it important to include a selective marker gene on a plasmid?
a) So that you can select cells containing the plasmid after transformation.
b) So that you can select where the plasmid inserts into the genome.
Oc) So that you can select the recombinant gene you want to add to the plasmid.
d) So that you can select when the recombinant gene on your plasmid is
expressed.
1)What is plasmid?
2) How do you explain the selection of plasmid for carrying the desired gene?
3) Follow the steps of human insulin production
4) Make a diagram for the production of growth hormone
Chapter 9 Solutions
Microbiology: An Introduction (13th Edition)
Ch. 9 - Compare and contrast the following terms: a. cDNA...Ch. 9 - Differentiate the following terms. Which one is...Ch. 9 - Some commonly used restriction enzymes are listed...Ch. 9 - Suppose you want multiple copies of a gene you...Ch. 9 - Which enzyme makes the smallest fragment...Ch. 9 - Describe a recombinant DNA experiment in two or...Ch. 9 - List at least two examples of the use of rDNA in...Ch. 9 - You are attempting to insert a gene for saltwater...Ch. 9 - How does RNAi silence a gene?Ch. 9 - Prob. 10R
Ch. 9 - Restriction enzymes were first discovered with the...Ch. 9 - The DNA probe, 3-GGCTTA, will hybridize with which...Ch. 9 - Which of the following is the fourth basic step to...Ch. 9 - The following enzymes are used to make cDNA. What...Ch. 9 - If you put a gene in a virus, the next step in...Ch. 9 - You have a small gene that you want replicated by...Ch. 9 - Pieces of human DNA stored in yeast cells. a....Ch. 9 - A population of cells carrying a desired plasmid....Ch. 9 - Self-replicating DNA for transmitting a gene from...Ch. 9 - A gene that hybridizes with mRNA. a. antisense b....Ch. 9 - Design an experiment using vaccinia virus to make...Ch. 9 - Why did the use of DNA polymerase from the...Ch. 9 - The following picture shows bacterial colonies...Ch. 9 - Prob. 1CAECh. 9 - Using the restriction enzyme ECORI, the following...
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- Which enzyme will they use to stick the fragment and the plasmid together?arrow_forwardYou want to propagate large amounts of a DNA fragment. To do this, use a plasmid vector. a) How should this plasmid vector be constructed? b) Also describe the function of the components.arrow_forwardWhat do you mean by vector plasmid?arrow_forward
- When a 5-kb circular plasmid is digested with a restriction enzyme that has three recognition sites on the plasmid, how many bands can be visualized on an agarose gel? a)1 b)2 c)5 d)3arrow_forwardWhy do we need a plasmid to transform a bacteria? What are the essential components of a plasmid and explain their functions. What is the difference between a Plasmid and a Vector?arrow_forwardAgrobacterium tumefaciens is a bacterium that infects a wide range of broad-leaved plants. During infection, a plasmid called Ti is transferred into the plant cells, where that plasmid DNA is integrated into the plant’s genome. Some of the genes encoded by this plasmid are expressed by host cell machinery in the plant cell. These gene products produce plant hormones which stimulate cell division in the infected cells, causing the development of a plant tumor which provides an environment for that bacterium to grow. You are studying a novel isolate of A. tumefaciens and want to determine which of the genes on the Ti plasmid are expressed in the bacterium, and which are expressed in the plant. You start by sequencing the Ti plasmid. a) Considering the DNA sequence of Ti, describe two specific genetic features that would help you to differentiate whether a given gene is likely expressed in the plant or bacterium. b) You collect plant tumor tissue, containing both bacterial and plant…arrow_forward
- Describe how restriction enzymes like EcoR1 are used to create recombinant plasmids and what the process is for using these plasmids to replicate a piece of target DNA. Include information about how to create sticky ends, the makeup of the bacterial plasmid and how to tell if the gene was successfully inserted in the plasmid and if the plasmid has been transformed by the bacteria. You may use a drawing to enhance your description.arrow_forwardYou have set up a recombinant DNA experiment using the plasmid PBR322 as the vector (see plasmid below). You use the BamHI restriction site on the plasmid to insert the target DNA. The plasmid is then used to transform E.coli colls Is the following statement True or False? Growth of the transformed cells on agar containing both ampicillin and tetracycline will eliminate any cells that do not contain a plasmid. Clal Hindlll EcoRI Pvul BamHI Pstl amp tet PBR322 -Sall ori rop Pvull True Falsearrow_forwardYou are cloning a gene called ice, which will help strawberry plants survive in cold weather, into a test group of strawberry plants. Select the events you would use to genetically engineer these plants. Insert the ice gene into the T-DNA region of a Ti plasmid; transform Agrobacterium tumefaciens with this plasmid; Inoculate a culture of strawberry plant cells with Agrobacterium tumefaciens; Select plant cells that have taken up the ice gene. Insert the ice gene into the T-DNA region of the Agrobacterium tumefaciens chromosome; Inoculate a culture of strawberry plant cells with Agrobacterium tumefaciens; Select plant cells that have taken up the ice gene. O Insert the ice gene into a Ti transposon; Introduce the transposon into Agrobacterium tumefaciens Ti plasmid: Inoculate a culture of strawberry plant cells with Agrobacterium tumefaciens: Select plant cells that have taken up the ice gene. Insert the ice gene into a Ti bacteriophage; transduce Agrobacterium tumefaciens with this…arrow_forward
- List the major steps that would be required to clone the human insulin gene into a plasmid and to identify bacterial colonies that contain the plasmid with the insulin gene inserted. Be sure to include a suggestion for how to select colonies with a plasmid and how to distinguish plasmids with and without the insulin gene insertedarrow_forwardIf we were to examine a strain with the F plasmid inserted into the same site of the bacterial chromosome, but in the reverse orientation: a) What would the order of gene transfer be? Include all of the genetic markers including the amino acid and nucleic acid metabolism genes and streptomycin resistance. b) What cell types would be able to grow on the NA vs ECM media types? Be sure to include the genotypes of the cells that would grow. Remember that NA provides all nutrients the bacteria needs + no antibiotic and HCM = minimal medium + glucose + has streptomycin antibiotic c) Would we still be able to perform our mapping? Why or why not? (Hint: refer to part b above)arrow_forwardA plasmid provides its host with kanamycin resistance. What will happen to the plasmid if you culture its host for many generations in the medium that does not contain kanamycin?arrow_forward
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