G282L/MCB2289L Section 03 Introduction to Microbiology Lab - Online - 2018 Summer Quarter

G282L/MCB2289L Section 03 Introduction to Microbiology Lab - Online - 2018 Summer QuarterCourse G282L/MCB2289L Section 03 Introduction to Microbiology Lab - Online - 2018 Summer Quarter Test Module 05 LearnSmart Lab Quiz Started 8/5/18 10:06 AM Submitted 8/5/18 10:22 AM Due Date 8/5/18 11:59 PM Status Completed Attempt Score 20 out of 20 points Time Elapsed 15 minutes out of 40 minutes Results Displayed All Answers, Submitted Answers, Correct Answers, Feedback, Incorrectly Answered Questions  Question 1 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: Enzymes Answers: Enzymes Cell wall Capsule Bacterial chromosome  Question 2 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: Microaerophile Answers: Microaerophile Obligate aerobe Facultative anaerobe Aerotolerant anaerobe  Question 3 1 out of 1 points This study source was downloaded by from CourseH on :18:02 GMT -05:00 This study resource was shared via CourseHMost human pathogens are classifed as thermophiles. Selected Answer: Fals e Answers: True Fals e  Question 4 1 out of 1 points All microorganisms use oxygen in their metabolism Selected Answer: Fals e Answers: True Fals e  Question 5 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 Answers: The bacterial cells will swell, but not lyse There will be no change in the bacterial cells The bacterial cells will undergo osmotic lysis The bacterial cells will undergo plasmolysis  Question 6 1 out of 1 points The ideal environment for microbial growth would be: Selected Answer: Warm, isotonic, neutral pH Answers: Warm, hypertonic, neutral pH Cool, hypertonic, acidic pH This study source was downloaded by from CourseH on :18:02 GMT -05:00 This study resource was shared via CourseHWarm, hypotonic, neutral pH Warm, isotonic, neutral pH  Question 7 1 out of 1 points A solution with a pH of 7 is acidic. Selected Answer: Fals e Answers: True Fals e  Question 8 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: Denaturati on Answers: Elongation Denaturati on Annealing Degradatio n  Question 9 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 Answers: Tru e False  Question 10 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? This study source was downloaded by from CourseH on :18:02 GMT -05:00 This study resource was shared via CourseHSelected Answer: 37 degree C incubator Answers: Refrigerator Freezer 37 degree C incubator 72 degree C incubator  Question 11 1 out of 1 points The term aerobic, anaerobic, and microaerophilic are used to categorize microorganisms based on their ______ requirements. Selected Answer: oxygen Answers: oxygen temperature carbon dioxide pH  Question 12 1 out of 1 points Atmospheric gases, nutrients, pH, energy sources and radiation are all examples of ______ factors that affect microbial growth Selected Answer: environmen tal Answers: chemical inhibitory biotic environmen tal  Question 13 1 out of 1 points This study source was downloaded by from CourseH on :18:02 GMT -05:00 This study resource was shared via CourseHAll of the following organisms are expected to grow within an anaerobe jar EXCEPT Selected Answer: Obligate aerobe Answers: Obligate anaerobe Aerotolerant anaerobe Obligate aerobe Facultative anaerobe  Question 14 1 out of 1 points A hypotonic solution is one with a solute concentration greater than that of a cell. Selected Answer: Fals e Answers: True Fals e  Question 15 1 out of 1 points Distilled water would be _______ to bacterial cells: Selected Answer: Hypotoni c Answers: Isotonic Hypotoni c Hyperton ic  Question 16 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 This study source was downloaded by from CourseH on :18:02 GMT -05:00 This study resource was shared via CourseHAnswers: A halotolerant organism An organism that does not tolerate hypertonic salt conditions very well An obligate anaerobe A psychrophile  Question 17 1 out of 1 points All of the following are environmental factors that affect microbial growth EXCEPT Selected Answer: cell wall type Answers: temperature osmotic pressure pH cell wall type  Question 18 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 Answers: Upper part of the tube Lower part of the tube Throughout the tube Middle part of the tube  Question 19 1 out of 1 points A microorganism will grow across the range of pH that allows for normal enzymatic function This study source was downloaded by from CourseH on :18:02 GMT -05:00 This study resource was shared via CourseHSelected Answer: Tru e Answers: Tru e False  Question 20 1 out of 1 points All of these terms categorize microorganisms based on their temperature preference EXCEPT which? Selected Answer: Microaerophi le Answers: Thermophile Microaerophi le Mesophile Psychrophile This study source was downloaded by from CourseH on :18:02 GMT -05:00 This study resource was shared via CourseH Powered by TCPDF ()