Microbiology: An Evolving Science (Fourth Edition)
4th Edition
ISBN: 9780393615098
Author: John W. Foster, Joan L. Slonczewski
Publisher: W. W. Norton & Company
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Chapter 9, Problem 15RQ
Summary Introduction
To review:
The following:
1. The process of transposition.
2. The insertion sequences are always flanked by direct repeats of host DNA (deoxyribonucleic acid).
3. The differences between transposons and plasmids.
Introduction:
Transposons are the mobile genetic elements that are able to move from one chromosome to another. The genes are also called jumping genes as they jump from one chromosomal position to another. Transposable elements are found in all living organisms and can move within the same chromosome or between two chromosomes.
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Chapter 9 Solutions
Microbiology: An Evolving Science (Fourth Edition)
Ch. 9.1 - Prob. 1TQCh. 9.1 - Prob. 2TQCh. 9.1 - Prob. 3TQCh. 9.1 - Prob. 4TQCh. 9.2 - Prob. 1TQCh. 9.3 - Prob. 1TQCh. 9.4 - Prob. 1TQCh. 9.4 - Prob. 2TQCh. 9.5 - Prob. 1TQCh. 9.6 - Prob. 1TQ
Ch. 9 - Prob. 1RQCh. 9 - Prob. 2RQCh. 9 - Prob. 3RQCh. 9 - Prob. 4RQCh. 9 - Prob. 5RQCh. 9 - Prob. 6RQCh. 9 - Prob. 7RQCh. 9 - Prob. 8RQCh. 9 - Prob. 9RQCh. 9 - Prob. 10RQCh. 9 - Prob. 11RQCh. 9 - Prob. 12RQCh. 9 - Prob. 13RQCh. 9 - Prob. 14RQCh. 9 - Prob. 15RQCh. 9 - Prob. 16RQCh. 9 - Prob. 1TQCh. 9 - Prob. 2TQCh. 9 - Prob. 3TQCh. 9 - Prob. 4TQCh. 9 - Prob. 5TQCh. 9 - Prob. 6TQ
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- A plasmid may A) replicate independently of the chromosome. B) be transferred cell-to-cell during conjugation. C) be integrated into the chromosome. D) replicate independently of the chromosome, integrate into the chromosome, or be transferred cell-to-cell during conjugation.arrow_forwardConsider a hypothetical phage whose DNA replicates exclusively by rolling circle replication. A phage with radioactive DNA in both strands infects a bacterium and is allowed to replicate in a nonradioactive medium. Assume that only daughter DNA from the elongated branch ever gets packaged into progeny particles. What fraction of the parental radioactivity will appear in the progeny phage? How many progeny phage will contain radioactive DNA? What is the fundamental difference between the initiation of θ replication and that of the rolling circle?arrow_forwardBelow is a diagram of the general structure of the bacteriophagel chromosome. Speculate on the mechanism by which it forms aclosed ring upon infection of the host cell. 5'GGGCGGCGACCT:double@stranded region-3' 3'- double@stranded region:CCCGCCGCTGGA5'arrow_forward
- Prophages and proviruses have been described as being similar to bacterial plasmids. How are prophages and proviruses similar to plasmids? How are they different from plasmids? – Review the structure and function of prophages, proviruses and plasmids, how do they replicate, where are they located within the host.arrow_forwardAssume that there are horizontal gene transfers between two completely different bacterial species. In one case it is a plasmid that is transmitted via conjugation, in the other case it is it is a part of the bacterial chromosome that is transferred via transformation. In which of the two cases is it likely that the transferred DNA will be present? left and can function in the recipient cells? Explain the biological background to your answerarrow_forwardWhat is the role of X-gal? What color will cells with the plasmid be in the absence of X-gal? Why?arrow_forward
- Which of the statements is TRUE about conjugation? a) Plasmid DNA is transferred from a donor (F+) cell b) It may only be performed by competent cells c) DNA is always integrated into recipient chromosome d) It may be specialized or generalizedarrow_forwardBacterial conjugation has medical consequences. For example, certain plasmids contain genes that code for toxins. The causative agent of a deadly form of food poisoning, E. coli 0157, synthesizes a toxin that causes massive bloody diarrhea and kidney failure. This toxin is now believed to have originated in Shigella, another bacterium that causes dysentery. Similarly, the growing problem of antibiotic resistance is partly attributable to the spread of antibioticresistant genes among bacterial populations. Antibiotic resistance develops because antibiotics are overused in medical practice and in livestock feeds. Suggest a mechanism by which this extensive use promotes antibiotic resistance.arrow_forwardA plasmid that can replicate in E. coli and Pseudomonas is most likely a/ana) broad host range plasmid.b) self-transmissible plasmid.c) high-copy-number plasmid.d) essential plasmid.e) low-copy-number plasmid.arrow_forward
- A cell is produced with a mutation that causes it produce a completely defective TFIIH. What does this likely mean for the fate of the cell? A) The cell's copied DNA may contain more errors. B) the cell cannot make RNA C) Producing RNAs will be slower because the polymerase will fall off the DNA more often. D) The cell cannot replicate its DNAarrow_forwardDescribe the role that integrase plays during the insertion of λDNA into the host chromosome.arrow_forwardExplain, with the aid of a hand drawn diagram, the life cycle of bacteriophage T4.arrow_forward
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