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Briefly explain the term cardinal temperatures and apply it to the terms psychrotrophic and mesophilic microorganism.
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- Compare and contrast the growth and physiology of obligate aerobes, facultative anaerobes, and strict anaerobesContrast an aerotolerant and an obligate anaerobe in terms of sensitivity to O2 and ability to grow in the presence of O2.Compare and contrast the growth and physiology of obligate aerobes, facultative anaerobes, microaerophiles, and strict anaerobes
- Which has a greater impact on the survival of an organism, temperatures above its maximum temperature or temperatures below its minimum temperature? Explain why and how this relates to typical methods used to control microbial growth.Describe the five phases of a microbial growth curve observed when growing microbes are grown in broth culture and discuss the causes of eachIdentify, by metabolic type, microorganisms responsible for dissimilatory nitrate, sulfate, and iron reduction; nitrification; and sulfur and iron oxidation
- Explain the adaptation that allows thermophiles to survive in very high temperatures.Compare and contrast oxygen requirements for obligate anaerobes and microaerophiles. Describe one laboratory media that can cultivate microbes with various oxygen requirements. Include the chemistry and how obligate anaerobes and microaerophiles would look if grown on this media.Describe the importance of a microorganism’s requirements for temperature, O2 , pH, and water availability, and define the terms that express these requirements.
- Which has a greater impact on the survival of an organism, temperatures above its maximum temperature or temperatures below its minimum temperature? Explain why and how this relates to typicalmethods used to control microbial growth.Calculate the doubling time (td) and specific growth rate (μ) using the logarithmic growth stage of the microorganism growth medium given below.Define microbial growth. Outline the effects of temperature, pH, osmotic pressure and oxygen onmicrobial growth.