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- 1. Which of the following is a benefit to using air as a respiratory medium compared to water? A) High levels of support for respiratory organs B) High oxygen availability C) Low risk of dessication D) All choices are correct E) Easy excretion of carbon dioxide F) High viscosity1.). a.) What particular pathways or enzymes appear distinct for sulfate reducing bacteria in order to harness energy (create ATP)? b.) What interesting structures or unique characteristics allowed sulfate reducing bacteria to solve physical and/or chemical challenges/problems in conserving energy?. What are the two major sources needed for microbial growth? (10) (i) …………………………… sources such as glucose, xylose, methanol, or lipids (ii) …………………………… sources such as urea, ammonium sulphate, ammonium nitrate and sodium nitrate.;
- 3. A) If the electron transport chain failed to work, why would chemiosmosis not occur? B) Your friend asks you “Why do we breathe in oxygen?" Based on what we learned in class and metabolism, how would you answer your friend's question? C) Your friend asks you “Why do we breathe out carbon dioxide?" Based on what we learned in class and metabolism, how would you answer your friend's question?What process is being represented by the image? A) Photosynthesis B) Respiration C)Anaerobic respiration D)BreathingWhich of the following statements is a correct distinctionbetween autotrophs and heterotrophs?(A) Autotrophs, but not heterotrophs, can nourish themselvesbeginning with CO2 and other nutrients that are inorganic.(B) Only heterotrophs require chemical compounds from theenvironment.(C) Cellular respiration is unique to heterotrophs.(D) Only heterotrophs have mitochondria.
- 10. Certain phenomena can be observed in a person running. What causes the runner's breathing rate to increase. a) The cells produce more CO2. b) The cells make more urea. c) The cells release more energy. d) The cells have a greater need for glucose.Microorganisms can have a variety of different relationshipswith oxygen. Describe the terms used to characterize a cell’sresponse to oxygen, and give an example from this chapter ofan organism that can be described by each of these terms.Identify the single most correct choice: () a) lodine can inactivate microbial cellular proteins. ( b) Alcohols may dissolve lipids and hence possess antimicrobial activities. c) Moist heat may result in protein denaturation and hence possess antimicrobial activities. 7 d) a and c e) b and c f) a, b and c
- What is the function of gas vesicles? How are thesestructures made such that they can remain gas tight?15-In general, the presence of an oxide film on the surface of a metal wil - d) reduce its reactivity. a) Increase the rate of corrosion. O b) Increase its potential to act as an anode. c) Increase its conductivity. 16-Which of the following phases of dental amalgam has minimum strength? a) Gamma 1 O b) Gamma 2 O d) Both a and b7) In aerobic respiration, the final electron acceptor is A) hydrogen B) oxygen C) water D) ATP