Design a concept map on microbial growth that would contain the key features of the following concepts (Requirements of microbial growth, Bacterial Growth, Control of Bacterial Growth and Antimicrobial methods).
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Design a concept map on microbial growth that would contain the key features of the following concepts (Requirements of microbial growth, Bacterial Growth, Control of Bacterial Growth and Antimicrobial methods).
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- Discuss briefly the phases of Microbial Growth Curve and why it is useful to plot the microbial growth from a growing microbial culture?4. (a) Which of the following chemical reactions is an overall oxidation-reduction (redox) reaction that involves oxidation number changes in their reactions? A. NaOH + H₂O → Na¹ + H3O+ + OH B. HCl + H₂O → H3O+ + Cl- C. CO₂ + H₂O → H+ + CO3²- D. N₂ + 3H₂ → 2NH3https://courses.lumenlearning.com/microbiology/chapter/controlling-microbial-growth/ Read this Article about Controlling Microbial Growth and answer the following questions: Which is most effective at removing microbes from a product: sanitization, degerming, or sterilization? Explain. What are two possible reasons for choosing a bacteriostatic treatment over a bactericidal one? Name at least two factors that can compromise the effectiveness of a disinfecting agent.
- Microbes are exposed to a wide variety of environmental factors that affect growth and survival. By giving two (2) examples, discuss how the microbial survival in various environmental conditions has been used to understand its ability to make flavorful and long shelf-life type of foods.A microbiologist has isolated a new strain of bacteria, and is trying to characterize aspects of its growth. Three flasks of the same media have different amounts of NaCl added. Other growth conditions are identical, and the flasks inoculated at the same time. At regular intervals over a 3 hour period, culture samples are taken and turbidity is measured. Here are the absorbance values over time in a table and graphed. Absorbance (OD600) Time (min) 20% NaCl 3% NaCl 0% NaCl 0 0.05 0.05 0.05 30 0.06 0.05 0.05 60 0.075 0.06 0.05 90 0.11 0.07 0.049 120 0.25 0.1 0.048 150 0.5 0.105 0.055 180 0.7 0.11 0.055 210 0.99 0.15 0.06 240 1.22 0.18 0.055 270 1.35 0.19 0.06 300 1.5 0.2 0.06 330 1.6 0.25 0.062 360 1.7 0.3 0.06 Based on these data, which of the following can be determined about this bacterium? It is psychrophilic. It…A study of microbial pathogen transport in an aqueous environment is to be studied. The target microorganism is Escheria Coli with a characteristic length of 25 micrometers. The pathogen moves at a rate of 2.5 micrometer/second. What model fluid should be used? Why?
- Discuss the possibility of life on Mars. In reference to extremophiles. Defend or refute this statement: The upper-temperature limit to life is 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? (argue both sides of this one). What challenges and advantages do you see with the use of extremeophiles in industrial or bioremediation applications?Summarize the terms used to characterize microbes based on they physical growth factors including... 1. pH (three terms, pH value, organism example each) 2. Temperature (five terms, temperature ranges, organism example each) 3. Oxygen (five terms, description of growth, organism example each) 4. Salt (three terms, salt concentration, organism example each)Explain the mechanism of action of several of the physical and chemical agents employed to control microbial growth.
- Z-germicSide is an antimicrobial agent. Based on the given data set below, describe how effective Z-germicSide is as a disinfectant. Name of disinfectant Z-germicSide Phenol KEY: No growth, += Growth Dilution 1:100 1:125 1:150 1:175 1:200 1:95 1:100 1:105 1:110 1:115 Growth after 5 mins + + + + + + Growth after 10 minutes + + Growth after 15 mins + +Why might clinical medicine have an interest in understanding bacterial cell division at the molecular level? Explain why a hyperthermophile would probably not be a human pathogen. Describe four factors that may have an influence on the effectiveness of an antimicrobial treatment. Explain why 70% or 80% alcohol is more effective than 100% alcohol in controlling microorganisms.Provide 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.