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- All of the following are ways microorganisms adapt to limited nutrients except: synthesize increased amount of enzymes for uptake and metabolism of limited nutrients form metabolically active highly resistant endospores synthesize enzymes needed to use a different nutrient acetic acid adjust the rate at which they metabolize nutrientsMicroorganisms are needed in wastewater treatment facility to do the actual breakdown and removal of nutrients and organic matter in the waste matter. One day, the employee who is in-charge of the facility notice that as the time goes by after the wastewater was loaded into the medium the metabolic activity of the microbe cease to increase and remain stable instead. Within the context of our discussion, what could be the possible explanation for the employee’s observation?Match the Cyanobacteria with the problems it causes in water supplies.
- Microorganisms degrade chemicals for the following reason(s): Select one: Obtain source of usable energy To create more microorganisms Biosynthesis of cellular component All sentences are true Two sentences are trueThe term "turbidity" in microbiology refers to: a cloudy appearance in broth, meaning microorganisms did grow a cloudy appearance in broth, meaning microorganisms did not grow a clear appearance in broth, meaning microorganisms did not grow the clump of cells at the top of a broth a clear appearance in broth, meaning microroganisms did growProvide 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.
- Match each organism with its most correct descriptor: A microbe that uses light energy in order to convert CO2 into organic carbon A microbe that uses light energy to break down organic compounds for further use in biosynthesis A microbe that uses the energy of sulfate reduction to convert CO2 into organic carbon [Choose] [Choose ] [Choose ] A microbe that can grow using only glucos✔ [Choose ] in the dark Photoautotroph Photoheterotroph Chemoheterotroph ChemoautotrophThe figure shows stratification of microbial layers in a Winogradsky column (a method used to simulate environments similar to microbial mats observed in nature). Cyanobacteria and algae Nonsulfur photosynthetic bacteria (e.g., Rhodomicrobium) Purple photosynthetic bacteria (e.g., Chromatium) Green photosynthetic bacteria (e.g., Chlorobium) Air Liquid Aerobic zone Microaerophilic zone (Less anaerobic) Anaerobic zone (More anaerobic) Mud mixed with sulfate and carbonate salts and cellulose or other organicsUse this graph showing the standard death curves of three microbial species to answer the following two questions. The three microbial species shown in the graph where all treated at 70° C. If you had to sterilize a food product that contained 107 bacteria, how long would it take for each bacterial species? Calculate the D70 values for these three bacterial populations. For the next three questions, assume D90 = 22 minutes. At what temperature will you treat a food product? How long does it take you to kill 90% of bacteria? How long will it take you to sterilize a food product if it had 109 bacteria on it? Serial Dilutions 6a. A sample is given to you that contains 6 million cells per ml. You must make a series of serial dilutions in order to get a countable number on a plate to prove that there are indeed 6 million cells per ml. The plate that you eventually put a sample of bacteria on must have between 10 and 100 colonies for ease of counting. What…
- Breakdown of the items in the image can occur through an anaerobic process to generate a renewable, combustible gas. Which term best describes the microbes that perform this: Select one alternative: Bacteria O Halophiles O Algae Methanogens O YeastsIf high temperatures are most effective at killing microbes, what statement correctly explains why some food products are treated with temperatures below the boiling point of water? Extremely high temperatures would destroy the food's nutritional value. Extremely high temperatures would significantly lower the food's shelf life. Extremely high temperatures can destroy the food's desirable characteristics. Extremely high temperatures promote the growth of some microbes.You have 2 organisms, A and B. One is an obligate aerobe and the other is an obligate anaerobe. You have 2 Nutrient Agar Plate Media that these organisms can grow on. How can you differentiate which organism is aerobic and which is anaerobic?