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Why does an optional anaerobic bacterium usually grow better with oxygen than without?
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- Why does an optional anaerobic bacterium usually grow better with oxygen?Why does an facaltive anaerobic bacterium usually grow better with oxygen than without?A chemolithoautotroph is respiring using only iron (Fe3+) and nitrite (NO2-). This bacterium does not consume organic molecules. From where does this organism obtain its carbon?
- if a bacterium lacks cytochrome C oxidase, does that make the bacterium an anaerobe? Explain?What is one difference between fermentation and anaerobic respiration? Since neither requires oxygen, why would a microbe select one of these versus the other? Name a specific microbe which uses fermentation and a specific microbe which uses anaerobic respiration.why are psychrotrophic bacteria incubated at 7 degrees?
- 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?What is the purpose in incubating one blood agar plate in aerobic conditions and another blood agar plate in microaerophilic conditions. Name and define five ways bacteria are classified based on their oxygen requirementsWhy would you not expect an obligate aerobe to have a fermentative pathway?
- Escherichia coli O157:H7 is a foodborne pathogen and can cause serious illness in humans by producing toxins that can severely damage the lining of intestines and kidneys. What are the oxygen requirements of coli? What result would you observe in the MTM agar deep test? Explain. Research on the growth requirements of this bacterium is required. What is the role of oxygen and cytochrome c oxidase in aerobic respiration? Why does the nitrate reduction tube turn red after the addition of zinc? Clostridium tetani is a common soil bacterium and causes tetanus. Would you expect tetani to possess the enzyme catalase? Explain. Research on the growth requirements of this bacterium is required.A chemolithoautotroph is respiring using only iron (Fe3+) and nitrite (NO2-). This bacterium does not consume organic molecules. What is the electron donor for this system?Two cultures of a facultative anaerobe are grown in the same medium, but one culture is exposed to air and the other is maintained under anaerobic conditions. Which of the two cultures will contain more cells at the end of a week? Why?