min-exam-mc - Question 1 2 out of 2 points Organisms that...

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Question 1 2 out of 2 points Organisms that will grow only in the presence of oxygen are referred to as: Selected Answer: B. obligate aerobes. Question 2 0 out of 2 points You are performing bacterial cell counts. You want to be able to differentiate the number of dead cells from the number of living cells in your culture. Which of the following would allow you to achieve this goal? Selected Answer: D. I would use fluorescent tags (stains) and fluorescent microscopy to achieve this goal. In other words, use a fluorescent tag for living cells and a different tag for dead cells. I would be able to view the two types under a fluorescence microscope. Question 3 2 out of 2 points During which phase of growth are bacteria most susceptible to antibiotics that target cell wall synthesis such as penicillin? Selected Answer: C. exponential (log) Question 4 2 out of 2 points Organisms that are indifferent to the presence of oxygen and do not use it are Selected Answer: A. aerotolerant anaerobes. Question 5 2 out of 2 points microaerophilic organisms generally carry which enzymes to deal with toxic oxygen-containing molecules? Selected Answer: C. they generally carry superoxide dismutase and may or may not have small amounts of
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catalase Question 6 0 out of 2 points During which phase of the bacterial growth curve does a bacterial population become produce large numbers of endospores (if they are endospore producers)? Selected Answer: E. None of the above are correct Question 7 2 out of 2 points Which of the following statements regarding a facultative anaerobe is (are) True ? Selected Answer: E. Answers a and c are correct. Question 8 2 out of 2 points Organisms that obtain electrons from the oxidation of inorganic compounds are called Selected Answer: B. Lithotrophs Question 9 2 out of 2 points Which of the following statements regarding siderophores is (are) true? Selected Answer: G. Answers A, B & D are correct. Question 10 2 out of 2 points Which of the following is not considered a macronutrient? Selected Answer: D. Cobalt (Co)
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Question 11 2 out of 2 points Which of the following statements are true concerning the phosphoenolpyruvate sugar phosphotransferase system (PTS)? Selected Answer: E. All of the above statements are true. Question 12 2 out of 2 points Which of the following statements regarding the lactose permease is (are) true?
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