Concept explainers
Describe how the process of gene doning results in a cell clone contaning a recombinant plasmid.
To explain: The gene cloning process that produces a cell clone having a recombinant plasmid.
Concept introduction:
To study a particular protein, multiple copies of the gene fragment encoding that protein are synthesized. These gene fragments are then inserted into the expression vector to synthesize a large quantity of protein that is encoded by the gene. This is known as gene cloning.
Explanation of Solution
For cloning a eukaryotic gene, the bacterial plasmid vector and the gene segment to be cloned are cleaved with the same restriction sites. Fig. 1 shows the cloning procedure using EcoRI restriction enzyme as both the sequences have their restriction sites. The arrows between the bases in Fig. 1 represent the restriction sites. The restriction digestion of the linear gene sequence and the plasmid sequence produces sticky ends. The digested gene sequence is ligated into bacterial plasmid and the recombinant plasmid is synthesized. This recombinant plasmid is reintroduced into the host cells (bacteria), where the eukaryotic gene expresses and forms proteins. The bacterial cells containing the recombinant plasmids will divide to form cell clones.
Pictorial representation:
Fig. 1 shows the cloning procedure using a gene sequence and bacterial plasmid.
Fig. 1 Cloning procedure
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Chapter 20 Solutions
Campbell Biology (11th Edition)
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Study Guide for Campbell Biology
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- Plasmids are the only vectors currently available for use in recombinant procedures.True or false?arrow_forwardUsing a flow diagram, elaborate on how you would generate a recombinant plasmid that can be used for the expression of a therapeutic insulin.arrow_forwardBriefly describe two different methods for inserting foreign DNA into plasmids, giving the strengths and weaknesses of each method.arrow_forward
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- a) If lacZ was successfully inserted into the plasmid and E. coli successfully transformed, then the lacZ gene will be expressed which will breakdown X-gal producing a blue-colored colony. b) If the gene of interest was successfully inserted into the plasmid and E. coli successfully transformed, then the LacZ gene will not be expressed so X-gal will be broken down leading to a blue-colored colony. c) If the gene of interest was successfully inserted into the plasmid and E. coli successfully transformed, then the LacZ gene will not be expressed so X-gal will not be broken down leading to a white-colored colony. d) If lacZ was successfully inserted into the plasmid and E. coli successfully transformed, then the lacZ gene will be expressed which will breakdown X-gal producing a white-colored colony.arrow_forwardDescribe the mechanisms of horizontal gene transfer in bacteria, describing the manner in which the DNA can be transferred from one cell to another.Choose a disease or an organism that has a well-documented mechanism of resistance (such as methicillin resistant Staphylococcus aureus - MRSA or tuberculosis) and identify the gene or genes that confer resistance and the method of DNA transfer thought to contribute to its spread. This may be from one organism to another or may simply be passed down from mother to daughter cell due to environmental pressure.arrow_forwardThe gene atg-12 codes for a protein associated with abnormal rates of cell destruction and recycling of cell contents. Scientists studying bacterial plasmids devised an experiment using recombinant DNA techniques to remove a section of DNA (gene atg-12) of a bacterial plasmid (pOKE103) and create a new plasmid (pOKE104) that did not contain the gene atg-12. The new plasmid was then incorporated within the DNA of the fungus Neurospora crassa in cellular studies. Which statement explains the expected heredity of fungi that incorporate pOKE104? A - Fungi that incorporate pOKE104 will produce the protein from gene atg-12 and have increased rates of malignant tumors. B - Fungi that incorporate pOKE104 will not produce the protein from gene atg-12 but will have a normal appearance. C - The prokaryotic DNA will remain separate within the fungal cells, produce the protein from gene atg-12, and have increased rates of malignant tumors. D - The prokaryotic DNA will remain separate within the…arrow_forward
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