MCB 2289LIntro to Micro Module 5 LearnSmart Quiz 5.

1. 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? Distilled water would be to bacterial cells: A solution with a pH of 7 is acidic. 2. The term aerobic, anaerobic, and microaerophilic are used to categorize microorganisms based on their requirements. 3. 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 ? An organism that has an optimal pH for growth below 5.5 is considered an acidophile The changes or breakdown of three dimensional proteins that may result from a pH outside 4. of an organism's growth range is referred to as 5. All of these terms categorize microorganisms based on their temperature preference EXCEPT which? 6. Which of the following would be used to provide the optimum growth temperature for microorganisms that typically grow in humans? All microorganisms use oxygen in their metabolism Where would you expect an obligate anaerobe to grow in a nutrient broth tube? A hypotonic solution is one with a solute concentration greater than that of a cell. 7. A hypertonic solution is prepared by the addition of sucrose. Which of the following would happen to bacteria placed in this solution: 8. Atmospheric gases, nutrients, pH, energy sources and radiation are all examples of factors that affect microbial growth All of the following organisms are expected to grow within an anaerobe jar EXCEPT The ideal environment for microbial growth would be: All of the following are environmental factors that affect microbial growth EXCEPT Most human pathogens are classified as thermophiles. A microorganism will grow across the range of pH that allows for normal enzymatic function 9. 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 ?