Question

17. At temperatures higher than the maximum growth temperature for an organism, A proteins are permanently denatured B membranes become too fuld for proper function Chydrogen bonds within molecules are broken DA and B E. A B and C 18 Some obligately anaerobic archaea are used in sewage treatment, and produce a fuel that can be used to produce electricity A thermophilic B. halophilic C. barophilic D. methanogenic E. psychrophilic 19. You open a jar that has been in the refrigerator for a couple of weeks and find the contents do not look or small right. What type of microbe has been growing in your refrigerator? A thermoduric B. thermophile C.mesophie D psychrophile E hyperthermophile 20. Metabolic activity is at a maximum level in the phase of growth A lag Blog C. death D. stationary E. intermediate 21. The movement of substances from higher to lower concentration across a semipermeable membrane that must have a specific protein carrier but no energy expenditure is called A facilitated diffusion B. simple diffusion Cosmosis D. an ion pump 22. Which of the following microbes would find hypotonic conditions most detrimental? A. Bacteria B. Fungi C. Protozoa D. Algae E. All would 23. The movement of substances from lower to higher concentration across a membrane that requires the indirect use of energy is called A bulk transport B. group translocation C. primary transport D. Secondary transport 24. A close relationship that is obligatory and mutually beneficial is A. antagonism B. commensalism (C. mutualism D. parasitism E. synergism 25. Cells regulate metabolism by controlling gene expression or metabolic expression. The latter may include controlling the presence of channel proteins and enzymes, sequestering reactions in organelles (eukaryotes), and feedback inhibition. Tor F 26. An organism that produces catalase enzyme is protected from the harmful effects of A singlet oxygen B. hydroxyl radical C. peroxide anion D. superoxide radical 27. Which of the following does NOT affect the function of enzymes? A. substrate concentration B. temperature C. pH D. activation energy E inhibitors 28. In ideal conditions, the complete aerobic oxidation of one molecule of glucose by a bacterium produces a net gain of ATP AO B. 1 C. 2 D. 30 E 38 29. Most reduction reactions in bacteria involve A removal of oxygen B. removal of hydrogen ions and electrons C. addition of hydrogen ions and electrons D. addition of hydrogen ions

Answer 1

* Answer is "E" A B and C proteins are are permanently denatweed, membrane become too fluid for proper function, hydroge bonds within molecules are broken * when the temperatures higher than the more mern growth temperature for an organism the hydrogen bonds are broken, proteins are denatored and membranes become too fluid