Answered: 4. Most human pathogens are ______ with…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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4. Most human pathogens are ______ with regard to temperature range of tolerance for optimum growth. * A. thermophiles B. mesophiles C. psychrophiles D. xerophiles 5. Which adaptations are developed by thermophiles to withstand extremely high temperature? Check all that apply. * ( ) high proportion of unsaturated fatty acids in the cell membrane ( ) high cytosine-guanine nitrogenous bases ( ) more saturated fatty acids in cytoplasmic membrane ( ) heat-stable enzymes 6. Which microbial group has relatively low moisture requirement for cell metabolism and growth? * A. actinomycetes B. fungi C. bacteria D. protozoa 7. How much oxygen gas (O2) must be present in a microenvironment for the microaerophilic microorganisms to grow at optimum? * A. 21% oxygen gas (1 atmosphere) B. completely absent C. minimal amount D. abundance or absence of O2 does not matter 8. Which microbial group can't survive in the presence of oxygen gas (O2)? * A. obligate aerobes B. facultative anaerobes C. obligate anaerobes D. facultative aerobes 9. Which term refers to microorganisms that survive best in a microenvironment with a pH of 2-2.8? * A. acidophiles B. alkaliphiles C. pH tolerant D. extreme alkaliphiles 10. Which microhabitat supports growth of halophilic microorganisms? Check all that apply. * ( ) Great Salt Lake ( ) bagoong (fish paste) ( ) Dead Sea ( ) fruit jam & jelly

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