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12. Enzymes that can be shut down or activated based on the presence of chemicals in their environment are called a) holoenzymes b) repressed c) constitutive d) regulated 13. An organism with a temperture growth range of 45"C to 60°C would be called a(n). a) extremophile b) psychrotroph c) thermoduric d) psychrophile d) thermophile 14. When microbes are in a close nutritional relationship, and one benefits but the other is not harmed it is called a) symbiosis b) satellitism c) commensalism d)mutualism e)synergism

12. Enzymes that can be shut down or activated based on the presence of chemicals in their environment are called a) holoenzymes b) repressed c) constitutive d) regulated 13. An organism with a temperture growth range of 45"C to 60°C would be called a(n). a) extremophile b) psychrotroph c) thermoduric d) psychrophile d) thermophile 14. When microbes are in a close nutritional relationship, and one benefits but the other is not harmed it is called a) symbiosis b) satellitism c) commensalism d)mutualism e)synergism

Human Anatomy & Physiology (11th Edition)
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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12. Enzymes that can be shut down or activated based on the presence of chemicals in their environment are called a) holoenzymes b) repressed c) constitutive d) regulated 13. An organism with a temperture growth range of 45°C to 60°C would be called afn) a) extremophile b) psychrotroph c) thermoduric d) psychrophile d) thermophile 14. When microbes are in a close nutritional relationship, and one benefits but the other is not harmed it is called a) symbiosis b) satellitism c) commensalism d)mutualism e)synergism 15. The term obligate refers to a) the ability to exist in a wide range of conditions b) existing in a very narrow niche c) using chemicals for energy production d) using oxygen for metabolism 16. The E. coli that normally live in the human large intestines and produce vitamin would best be termed a relationship a) parasitic b) saprobic c) commensal d) mutualistic 17. A holoenzyme is a combination of a protein and a substance called a) apoenzymes bị cofactors c) catalysts reactants d) substrates 18. The movement of molecules from an area of high concentration to an area of lower concentration is called a) active transport b) facilitated diffusion c) diffusion d) osmosis endocytosis 19. Archaea, as a group, are not pathogens. This is because a) they evolved without mammals b) mammals evolved special defenses against them c) mammalian hosts do not meet their environmental requirements d) they are outcompeted by natural flora None of the choices are correct 20. The phase of the bacterial growth curve in which the rate of cell division is exponential is the a) lag phase b) log phase c) stationary phase d) death phase e) telophase 21 Exergonic reactions a) include synthesis of large carbohydrates b) only occur in heterotrophs c) release energy d) occur when ADP binds to inorganic phosphate to form ATP
Transcribed Image Text:12. Enzymes that can be shut down or activated based on the presence of chemicals in their environment are called a) holoenzymes b) repressed c) constitutive d) regulated 13. An organism with a temperture growth range of 45°C to 60°C would be called afn) a) extremophile b) psychrotroph c) thermoduric d) psychrophile d) thermophile 14. When microbes are in a close nutritional relationship, and one benefits but the other is not harmed it is called a) symbiosis b) satellitism c) commensalism d)mutualism e)synergism 15. The term obligate refers to a) the ability to exist in a wide range of conditions b) existing in a very narrow niche c) using chemicals for energy production d) using oxygen for metabolism 16. The E. coli that normally live in the human large intestines and produce vitamin would best be termed a relationship a) parasitic b) saprobic c) commensal d) mutualistic 17. A holoenzyme is a combination of a protein and a substance called a) apoenzymes bị cofactors c) catalysts reactants d) substrates 18. The movement of molecules from an area of high concentration to an area of lower concentration is called a) active transport b) facilitated diffusion c) diffusion d) osmosis endocytosis 19. Archaea, as a group, are not pathogens. This is because a) they evolved without mammals b) mammals evolved special defenses against them c) mammalian hosts do not meet their environmental requirements d) they are outcompeted by natural flora None of the choices are correct 20. The phase of the bacterial growth curve in which the rate of cell division is exponential is the a) lag phase b) log phase c) stationary phase d) death phase e) telophase 21 Exergonic reactions a) include synthesis of large carbohydrates b) only occur in heterotrophs c) release energy d) occur when ADP binds to inorganic phosphate to form ATP
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