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- 1. Give other example of cereal/legume product that is fermented by molds. 2. What is the difference between alcoholic and acetic acid fermentation in terms of cultures used to start the fermentation?1. Define Optimum Temperature. 2. Why is the temperature of pasteurization at 60°C? 3. Why are food frozen at a temperature below 0°C?1. If the yogurt were contaminated, how would thr gram stain look like? And how will it affect the taste and smell of the yogurt? 2. How are microbial fermentations used to preserve food?
- 1.) Why probiotic fermented food nutritious? 2.) How will you eliminate yeast contamination in yogurt production?1. why is there a need to incubate cultures at room temperature? How can this affect microbes? 2. Explain why an inverted image is seen under a compound microscope.Yeast is a facultative anaerobe. This means that alcohol fermentation takes place only if: the temperature is close to 37°C the atmosphere does not contain oxygen sugar is provided to the cells light is provided to the cells
- 1) In capsule staining, why does the capsules did NOT take in any dye? 2) In endospore staining, what is the purpose of using the steam?1.What is the purpose of resazurin in thioglycollate medium? 2.Why does thioglycollate medium have only a small amount of agar in it? 3.How is a facultative anaerobe different from a facultative halophile? 4.Explain how a strict aerobe is different from a strict anaerobe. 5.What would happen to the bacteria if you accidentally closed all of the caps all the way? Would any of the cultures have grown? If so, explain which would grow and which wouldn’t.3) In some experiments, Serratia and the Bacillus are exposed to UV radiation for different duration to achieve sterilization. Why?
- 1. If you are a thermophilic endospore forming bacterium what would be the appropriate and economically wise method for your preservation? Which culture collection centers will you select and why?Catalase: 1. Explain the incubation conditions 2. Explain the reagents being added 3. Explain the observations in Catalase 4. Explain the interpretations in Catalase1) would you describe the contents of the soil-inoculated broth as being a “pure culture”? Why or why not? 2) How did the uninoculated broth differ in appearance from the broths inoculated with E. Coli and M. Luteus? And then how could you tell if a supposedly sterile, uninoculated broth was contaminated? Please explain in detail and highlight the important parts cuz I am confused and need help! Thanks