G282L/MCB2289L Section 2L Introduction to Microbiology Lab - Residential and Online

G282L/MCB2289L Section 2L Introduction to Microbiology Lab - Residential and Online - 2017 Summer Quarter  Question 1 1 out of 1 points A hypotonic solution is one with a solute concentration greater than that of a cell. Selected Answer: Fals e  Question 2 1 out of 1 points Human skin provides an environment with NaCl levels slightly above that of most bacterial cells. Which organism would most likely be found on the skin? Selected Answer: A halotolerant organism  Question 3 1 out of 1 points All of these terms categorize microorganisms based on their temperature preference EXCEPT which? Selected Answer: Microaerop hile  Question 4 1 out of 1 points All microorganisms use oxygen in their metabolism Selected Answer: Fals e  Question 5 1 out of 1 points An organism that has an optimal pH for growth below 5.5 is considered an acidophile Selected Answer: Tru e  Question 6 1 out of 1 points Atmospheric gases, nutrients, pH, energy sources and radiation are all examples of ______ factors that affect microbial growth Selected Answer: environme ntal  Question 7 1 out of 1 points The slowed growth or lack of growth of an organism at temperatures of pH outside of its ideal range is most likely due to changes in its ________? Selected Answer: Enzym es This study source was downloaded by from CourseH on :58:49 GMT -05:00 This study resource was shared via CourseH Question 8 1 out of 1 points The ideal environment for microbial growth would be: Selected Answer: Warm, isotonic, neutral pH  Question 9 1 out of 1 points Which of the following would be used to provide the optimum growth temperature for microorganisms that typically grow in humans? Selected Answer: 37 degree C incubator  Question 10 1 out of 1 points An organism that is unable to grow in the presence of atmospheric levels of gaseous oxygen, but needs a small amount of oxygen for its metabolism is called a __________________? Selected Answer: Microaerop hile  Question 11 1 out of 1 points Most human pathogens are classifed as thermophiles. Selected Answer: Fals e  Question 12 1 out of 1 points A solution with a pH of 7 is acidic. Selected Answer: Fals e  Question 13 1 out of 1 points A hypertonic solution is prepared by the addition of sucrose. Which of the following would happen to bacteria placed in this solution: Selected Answer: The bacterial cells will undergo plasmolysis  Question 14 1 out of 1 points All of the following organisms are expected to grow within an anaerobe jar EXCEPT Selected Answer: Obligate aerobe  Question 15 1 out of 1 points A microorganism will grow across the range of pH that allows for normal This study source was downloaded by from CourseH on :58:49 GMT -05:00 This study resource was shared via CourseHzymatic function Selected Answer: Tru e  Question 16 1 out of 1 points Where would you expect an obligate anaerobe to grow in a nutrient broth tube? Selected Answer: Lower part of the tube  Question 17 1 out of 1 points The term aerobic, anaerobic, and microaerophilic are used to categorize microorganisms based on their ______ requirements. Selected Answer: oxyg en  Question 18 1 out of 1 points All of the following are environmental factors that affect microbial growth EXCEPT Selected Answer: cell wall type  Question 19 1 out of 1 points The changes or breakdown of three dimensional proteins that may result from a pH outside of an organism's growth range is referred to as ______________ Selected Answer: Denaturat ion  Question 20 1 out of 1 points Distilled water would be _______ to bacterial cells: Selected Answer: Hypoton ic This study source was downloaded by from CourseH on :58:49 GMT -05:00 This study resource was shared via CourseH Powered by TCPDF ()