Homework Answers
Obligate Anaerobes grow in complete absence or very little concentration of oxygen (depending upon the oxygen tolerance of individual species). Oxygen produces free radicals (reactive oxygen species) such as superoxides and peroxides that are harmful for the cells which in case of aerobes are detoxified by enzymes superoxide dismutase and catalase.
Obligate anaerobes produce these enzymes in very less quantities and presence of oxygen poisons the obligative anaerobes leading to their death.
Log phase of microbial growth is characterized by the increase in number of cells following the lag phase where cells prepare themselves to divide.
There will be no logarithmic growth line for obligate anaerobes in the presence of oxygen. The cells will undergo the phase of decline.
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2. Know how to graphically analyze how different bacteria types would survive under specific conditions. For...
1. You have encountered 2 different pathogenic bacteria in the past 3 months and developed an...
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1. Many bacteria survive in the absence of oxygen. Discuss the two methods obligate anaerobes use...
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Nitrate broth lab 1. what role does nitrate play in respiration 2. what nitrate reduction result...
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Now that you know how fast your bacteria grows, you want to determine its metabolic strategy....
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2. What mode of reproduction do bacteria use? Describe a bacterial growth curve. Describe what happens...
2. What mode of reproduction do bacteria use? Describe a
bacterial growth curve. Describe what happens at each step along
the curve. What are some parameters that would affect how the curve
looks? How would you predict the curve would look under different
conditions?
17. Big Red's spot test produced the results shown below: What conclusions can be drawn from these results?
correct the ones marked wrong, and explain why they are the right answer Part I. Multiple...
correct the ones marked wrong, and explain why they are the
right answer
Part I. Multiple Choice. 1.5 points each, 32 questions, 48 points to Fill in the blank with the correct answer choice. 1. Which of the following is NOT required for microorganisms to grow and divide? ationefoliciningisson re edcorator als D replication b. binary fission um ormation injustt e@hours. This Cequatorial septum formation d. conjugation 2. A culture of Salmonella increases from 20 cells to over 10,000 cells...
Post Lab Questions 1. In our experiment, if Fe(SCN)2+ forms under acidic conditions, how would you...
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Under the Microscope 1. Which microbes usually cause gas gangrene? 2. How did the patient's diabetes...
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L. Under that conditions of temperature and pressure would you expect gases to obey the ideal-gas...
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1. You have encountered 2 different pathogenic bacteria in the past 3 months and developed an upper respiratory tract infection of the same approximate magnitude each time. The inoculum size of organism #1 was 100 organisms, the inoculum size of organism #2 was 500 organisms. Explain how this is possible-that each would produce the same amount of disease. 2. Nosocomial infections. What are they and give a specific example. 3. Indicate at least 4 contributing causes to the development of...
2. What mode of reproduction do bacteria use? Describe a
bacterial growth curve. Describe what happens at each step along
the curve. What are some parameters that would affect how the curve
looks? How would you predict the curve would look under different
conditions?
17. Big Red's spot test produced the results shown below: What conclusions can be drawn from these results?
correct the ones marked wrong, and explain why they are the
right answer
Part I. Multiple Choice. 1.5 points each, 32 questions, 48 points to Fill in the blank with the correct answer choice. 1. Which of the following is NOT required for microorganisms to grow and divide? ationefoliciningisson re edcorator als D replication b. binary fission um ormation injustt e@hours. This Cequatorial septum formation d. conjugation 2. A culture of Salmonella increases from 20 cells to over 10,000 cells...
Post Lab Questions 1. In our experiment, if Fe(SCN)2+ forms under acidic conditions, how would you explain any changes if NaOH is added? 2. If you added NH4Cl to the equilibrium system of NaCl (s) + → Na(aq) + Cl (aq) Which way, if any, does the equilibrium shift? How do you know?
Under the Microscope 1. Which microbes usually cause gas gangrene? 2. How did the patient's diabetes impact his lower Jamal recently started moonlighting at a wound care center run by the hospital where he works as a CST. He realized that the 70-year-old diabetic patient he was helping prepare for hyperbaric oxygen therapy was the same patient who had recently undergone a below-knee amputation (BKA) for gas gangrene. Jamal was the first scrub. extremity prior to surgery? to amputation? therapy...
L. Under that conditions of temperature and pressure would you expect gases to obey the ideal-gas equation? 2 Calculate the value of R in L-atm/mol-K by assuming that an ideal gas occupies 3 Why do you equalize the water levels in the bottle and the beaker? 5 What is the value of an error analysis? 224 Lmol at STP 4 Why does the vapor pressure of water contribute to the total pressure in the bottle? Suggest reasons why real gases...
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