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1. Is it possible to use mineral oil to preserve an obligately anaerobic organism? Why or why not? Explain you answer comprehensively and please, do not just copy from somewhere.
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- 1. What are the reasons on why the growth factors added in culture media of some but not of all bacteria? Answer it comprehensively and please, do not just copy from somewhere.1. Based on E.Coli & P.aeruginosa, which antibiotic would be recommended to use for both microbes & why? Explain in one sentence only.1. What would be the appropriate and economically wise method for the preservation of a thermophilic endospore forming bacterium? (Lyophilization or Drying)? Explain your choice and discuss it comprehensively. Please, do not just copy from somewhere.
- 1. What are the specific roles of growth factors in a bacterium. Discuss it thoroughly and please, do not just copy from somewhere.1. Why are there so many antibiotic-producing organisms in soils?1. If an organism tests positive for catalase, which of the following is MOST likely true about the organism? It returns nitrogen back to the atmosphere It can only do homolactic fermentation It creates H2O as a product of respiration It can break down plasma membranes
- At the health center, a fecal sample was taken from a feverish student. Organisms with corkscrewlike flagella and no endomembranes but with cell walls that lack peptidoglycan were isolated as the cause for the illness. These organisms probably belong to the group: a. chlamydias. b. spirochetes. c. Euryarchacota. d. Cyanobacteria. e. Archaea.What is a biofilm? Give an example of a biofilm that is beneficial to humans and one that is harmful.Yeast is a facultative anaerobe. This means that alcohol fermentation takes place only if: the temperature is close to 37°C the atmosphere does not contain oxygen sugar is provided to the cells light is provided to the cells
- Penicillin, an antibiotic, inhibits the formation of cross-links between sugar groups in peptidoglycan. Bacteria treated with penicillin should be: a. acrobic. b. anaerobic. c. Gram-negative. d. Gram-positive. e. flagellated.An organism characterized as a photoautotroph obtains energy from _____ and carbon from _______. (a) light; organic molecules (b) light; CO2 (c) organic molecules; organic molecules (d) organic molecules; CO2 (e) O2; CO21. What attributes would a microbe need (physical or biochemical) to be able to: a. Travel from Africa to North America and remain viable? b. Flourish in the new environment if it was pathogenic for man?c. Flourish in the new environment if it was pathogenic for plants?d. Flourish in the new environment if it was a soil organism?
