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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Textbook Question
Chapter 8, Problem 7R
Which sequence is the best target for damage by UV radiation: AGGCAA, CTTTGA, or GUAAAU? Why aren’t all bacteria killed when they are exposed to sunlight?
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Chapter 8 Solutions
Microbiology: An Introduction (13th Edition)
Ch. 8 - Briefly describe the components of DNA, and...Ch. 8 - DRAW IT Identify and mark each of the following on...Ch. 8 - Match the following examples of mutagens. Column A...Ch. 8 - The following is a code for a strand of DNA. a....Ch. 8 - Prob. 5RCh. 8 - Identify when (before transcription, after...Ch. 8 - Which sequence is the best target for damage by UV...Ch. 8 - You are provided with cultures with the following...Ch. 8 - Why are mutation and recombination important in...Ch. 8 - NAME IT Normally a commensal in the human...
Ch. 8 - Match the following terms to the definitions in...Ch. 8 - Match the following terms to the definitions in...Ch. 8 - Feedback inhibition differs from repression...Ch. 8 - Bacteria can acquire antibiotic resistance by all...Ch. 8 - Suppose you inoculate three flasks of minimal...Ch. 8 - Plasmids differ from transposons in that plasmids...Ch. 8 - Mechanism by which the presence of glucose...Ch. 8 - The mechanism by which lactose controls the lac...Ch. 8 - Two offspring cells are most likely to inherit...Ch. 8 - Which of the following is not a method of...Ch. 8 - Nucleoside analogs and ionizing radiation are used...Ch. 8 - Replication of the E. coli chromosome takes 40 to...Ch. 8 - Pseudomonas has a plasmid containing the mer...Ch. 8 - Ciprofloxacin, erythromycin, and acyclovir are...Ch. 8 - HIV, the virus that causes AIDS, was isolated from...Ch. 8 - Human herpesvirus-8 (HHV-8) is common in parts of...
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- To maximize the number of mutations following UV irradiation, should you incubate the irradiated cells in the light or in the dark, or does it make any difference? Explain your answer.arrow_forwardIn the Meselson experiment, would it have been possible to utilize N14 in the original bacteria and only allow growing bacteria to access N15 to build new (F1) bacteria and get the same results? Explain why. (I need an answer in full complete sentences with the question restated in the response.)arrow_forwardIn order to transform a bacteria, the cell wall should be perforated either through physical or chemical means. true or false?arrow_forward
- The cath sample was both filtered to remove all bacteria, and then treated with DNase. Based on what you know about the cath sample contents, how did the bacteria exposed to this treated sample still become antibiotic resistant?arrow_forwardWhat properties in microorganisms were researchers at SINTEF and NTNU looking for? What made them select Micrococcus luteus as a candidate organism? Describe the steps involved in genetic engineering, prior to commercial production of the potential `UVAblue’ sunscreen. What damage do long wave UV radiations induce in human cells?arrow_forwardHow is bacterial transformation useful to us?arrow_forward
- If E.coli was allow to grow for 80 minutes then what would be the properation of light and hybrid densities DNA molecules?arrow_forwardYou are studying a type of bacteria isolated from the acidic water runoff of a mining operation. You subject two batches of the same bacteria type to different environmental growth conditions. One batch is grown at pH 2, while the other is grown at pH 7. All other environmental parameters are kept identical between the two batches. You then collect their proteins and run a Western blot using an antibody that binds to a proton efflux pump protein (which actively expends energy to pump protons out of a cell). How would you characterize the information obtained in this experiment? What does it tell you, and why is that potentially valuable information?arrow_forwardExtrachromosomal DNA is critical to the antibiotic resistance found in microorganisms, how do these DNA elements account for this phenomena?arrow_forward
- Are the bands indicated in Step 6 (SDS-PAGE) likely visualized by western blot or by a general protein stain (such as Coomassie or silver)?arrow_forwardSome bacteria may have higher mutation rates than others following exposure to UV light. Discuss a reason why this might be the case. What experiments could you do to determine whether this is a likely possibility?arrow_forwardWhy is Agrobacterium mediated genetic transformation described as Natural Genetic engineering in plants?arrow_forward
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