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- What is one situation where Koch’s postulates are impossible to complete? In other words, what factors about a microbe or factors about a disease make it impossible for Koch's postulate to be performed with that microbe or disease?Name two or more situations where Koch’s postulates are impossible to complete? In other words, what factors about a microbe or factors about a disease make it impossible for Koch's postulate to be performed with that microbe or disease?Match the microorganisms in column A with their corresponding product incolumn B, then match your answer in column B to column C.
- Why is it not safe to assume that two microorganisms with the same G + C content belong to the same species? In what ways are G + C content data taxonomically valuable?A cell population has 10,000,000 cells and you add a disinfectant. Assume the constant D-value is 5 minutes. How many cells will be left after 10 minutes?placing bacteria at ultracold temperatures is as effective at killing microbes as the use of dry heat in incineration. is is true/false?
- When applying a disinfectant to kill microbes, our bead experiment showed that what two factors affect how effectively microbes will be killed?What substance is produced by a microorganism that is capable of the growth of other microorganisms? Give a concrete example of your answer.Is the autoclaving process absolute in killing all microorganisms? If not, what are the factors that hinder effective sterilization through autoclaving? When can you say that the sterility of an instrument is compromise?
- What conclusion would you draw if the numbers of bacterial colonies in were the same on the control plate and the treatment plate? Explain your reasoning.You treat cells briefly with radioactively labeled cysteine and then transfer them to a medium with unlabeled cysteine. Where would you expect to detect radioactivity immediately after the transfer to the unlabeled medium? Where would you expect to detect it an hour later?During 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?