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how it is possible for certain microbes to survive and grow in the presence of cyanide, which would kill many other organisms?
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- Explain how it is possible for certain microbes to survive and grow in the presence of cyanide, which would kill many other organisms.Because elemental poisons, such as heavy metals, cannot be furtherdegraded even by microbes, what is a possible fate of these metals?Why are microbial cells negatively charged? Why are clay particles negatively charged? How can microbes attach to clay particles if they are both negatively charged? How can microbes access large complex cellulose polymer molecules for intracellular metabolism?
- Most living organisms cannot survive at temperature above 45°C. How are some microbes able to live in habitats with temperatures exceeding 100°C?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.Microbes are found mostly in topsoil, but some are found miles deep in bedrock. Nutritionally, how do deeply buried microbes survive?
- How can organisms develop resistance to chemical disinfectants?Requires oxygen at a lower concentration than typically found in air. Question 3 options: a) Obligate aerobe b) Facultative anaerobe c) microaerophile d) None of the aboveDuring the fall 2001 bioterrorist attack in which anthrax endospores were sent through the mail, one news commentator suggested that people should iron all their incoming mail with a regular household iron as a means of destroying endospores. Would you agree that this is a good way to disinfect mail? Explain your answer. Which disinfectant methods would be both more effective and more practical?
- a) bacteria are “obligate anaerobes.” What does this mean? On Earth, where might these organisms live? (Give examples.) b) Humans (and most Eukaryotic organisms) are obligate aerobes. What does this mean? On Earth, where might these organisms live? (Give examples.)Why are some microorganisms capable of utilizing certain carbohydrates and some are not?Identify the single most correct choice: () a) lodine can inactivate microbial cellular proteins. ( b) Alcohols may dissolve lipids and hence possess antimicrobial activities. c) Moist heat may result in protein denaturation and hence possess antimicrobial activities. 7 d) a and c e) b and c f) a, b and c