Biological Science
17th Edition
ISBN: 9781323465028
Author: Freeman
Publisher: Pearson Education
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Chapter 26, Problem 10TYPSS
PROCESS OF SCIENCE Suppose that you’ve been hired by a firm interested in using bacteria to clean up organic solvents found in toxic waste dumps. Your new employer is particularly interested in finding cells that are capable of breaking a molecule called benzene into less toxic compounds. Where would you go to look for bacteria that can
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Chapter 26 Solutions
Biological Science
Ch. 26 - 1. What do some photosynthetic bacteria use as a...Ch. 26 - What are organisms called that use inorganic...Ch. 26 - Prob. 3TYKCh. 26 - Prob. 4TYKCh. 26 - 5. What has metagenomic analysis allowed...Ch. 26 - Prob. 6TYUCh. 26 - Prob. 7TYUCh. 26 - Prob. 8TYUCh. 26 - PROCESS OF SCIENCE Streptococcus mutans obtains...Ch. 26 - PROCESS OF SCIENCE Suppose that you’ve been hired...
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- In a dark cave, you discover a microscopic creature growing by stripping electrons from Cu+ (cuprous copper) and fixing atmospheric carbon. Your new pet, "Little Blue", is a: a) Chemoautotroph b) Chemoheterotroph c) Photoautotroph d) Photoheterotropharrow_forwardDiscuss the possibility of life on Mars. Will extremophiles prove useful? Can you explain the upper-temperature limit to life unrelated to the stability of proteins or nucleic acids? How influential is microbial activity on the geological processes of mineral formation and deposition compared to biological processes? Can you argue both sides? What are the challenges and advantages of the use of extremeophiles in industrial or bioremediation applications?arrow_forwardSuppose you have a bacterium, which is normally killed in an hour when growing in a medium containing penicillin. This bacterium is an auxotroph and requires tryptophan for growth. When placed in a medium lacking both tryptophan and penicillin, the bacterium neither grows nor dies for several hours. Question: Is it killed in an hour in a medium lacking tryptophan but containing penicillin? (Yes/No and explain briefly why).arrow_forward
- You are characterizing a newly discovered organism . You have noticed that the organism grows on two carbon sources - sucrose and mannitol . Whenever you add both sugars to the medium , sucrose will be completely metabolized before mannitol . a ) What is this growth pattern called ? b ) Describe a possible growth curve of sequential metabolism of the sugars .arrow_forwardYou are a technician working in a microbiology lab. You grow two bacteria cultures, Bug A and Bug B, for two purposes: You want to harvest lactic acid for sports drinks from Bug A. You want to harvest antibiotics from Bug B for the pharmaceutical industry. Describe how you would maintain the two cultures, how you might manage their nutrient supply and waste products in order to induce them to produce the desired products. Which stage of the growth curve would you try to keep them in?arrow_forwardThe diagram shows the growth curve of Escherichia coli in a suspension culture containing glucose and lactose. Optical density is used to measure the concentration of bacteria in the suspension culture. Use the image to answer the question. Which statement BEST supports the information in the graph? A. E. coli metabolizes lactose and glucose. B. E. coli metabolizes glucose first, then lactose. C. E. coli metabolizes lactose first, then glucose. D. E. coli metabolizes lactose and glucose at the same time.arrow_forward
- In microbiology, the term growth in a culture usually refers to an increase in O 1) the number and size of microbial cells. O 2) the amount of ATP consumed. O 3) a microbe's size. O 4) the number of microbial cells. 5) the amount of ATP produced.arrow_forwardProvide an example of an organism within each of the four main nutritional categories of microbes and describe how each obtains its essential nutrients. Provide evidence in support of or refuting the following statement: Microbial life can exist in the complete absence of both sunlight or organic nutrients. Polymerase chain reaction (PCR) is a technology that requires high temperatures to reproduce DNA fragments. Explain why the discovery of thermophilic archaea and their associated DNA polymerases was critical to the success of this technique. Summarize how the electron transport chain functions to produce ATP in a bacterial cell versus eukaryotic cell. Explain whether or not the term chemiosmosis accurately illustrates this process.arrow_forwardWhich of these statements is/are TRUE? A) In general, species that can grow at higher temperatures are prokaryotic. B) The most thermophilic prokaryotes are species of Archaea. C) Chemoorganotrophic organisms are able to grow at higher temperatures than phototrophic organisms. D) All of the statements are true.arrow_forward
- ). Consider a culture medium on which only gram-positive organisms such as Staphylococcus aureus colonies can grow due to an elevated NaCl level. A yellow halo surrounds the growth, indicating the bacterium fermented sugar in the medium, decreasing the pH as a result and changing the color of a pH indicator chemical. This type of medium would be referred to as a(n): A) Selective medium. B) Differential medium. C) Enrichment culture. D) Selective and differential medium. E) Differential and enrichment culture.arrow_forwarddescribe the molecular switches involved in microbial stationary growth phase. give one research article linkarrow_forwardImagine you work for an industrial chemical company and you have been asked to design a novel cleaning agent against a group of microorganisms. Select a specific organism representative of the group you chose, gather information about it, and identify the potential "target" within the organism suitable for your cleanser to attack, discussing how your chemical will control the growth of the organism. Consider things such as concentration, amount of time needed for exposure, or anything else that would influence efficacy.arrow_forward
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Chapter 5 Microbial Metabolism; Author: Heather Davis;https://www.youtube.com/watch?v=wH_HrsfDWZw;License: Standard Youtube License