Which of the following groups of bacteria require or will use oxygen for respiration i. obligate aerobes ii. facultative anaerobes iii. obligate anaerobes iv. microaerophile v. aerotolerant anaerobe i & iv ii. & iv Oi&ii i, ii, iv ii & iv
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- Requires oxygen at a lower concentration than typically found in air. Question 3 options: a) Obligate aerobe b) Facultative anaerobe c) microaerophile d) None of the aboveA type of bacteria that can only grow in a medium with no oxygen would be referred to as a(n) _______. Question 10 options: A) obligate aerobe B) obligate anaerobe C) microaerophile D) facultative anaerobeA microbe that does not require oxygen for metabolism but will use it ifavailable is a/ana. microaerophile.b. facultative anaerobe.c. obligate anaerobe.d. aerotolerant anaerobe.e. obligate aerobe.
- Out of the 5 possible oxygen requirements (Obligate aerobes, microaerophiles, etc), what specifically is E. coli, Pseudomonas aeruginosa, and Clostridium sporogenes?missing a name or two from the list (Enterobacter aerogenes), and (Serratia rubidaea) - should be 20 Proteus Vulgaris (spelling) is eliminated under citrate so you can't have it at the end. Which test MR or VP - not both some of the above choices are strict aerobes and some are facultative anaerobes. This is helpful to first eliminate a set from your possibilities (look them up to figure this out)At first eliminate the organisms that *cannot* do something your organism *can*. This means you have a positive test result and you eliminate those that are always negative for that result. That way you do not have to worry that you accidentally killed the unknown before you inoculated it. You Do still need to be concerned that you interpreted the test results correctly and did not introduce a contaminant that has the ability you were testing while your true unknown did not.Out of the 5 possible oxygen requirements (Obligate aerobes, microaerophiles- is E. coli, Pseudomonas aeruginosa, and Clostridium sporogenes? sketch below (or describe well with words), what growth would look like for each species in FTM tubes.
- Why are the Methyl Red/Voges-Proskauer tests done after 48 hours of incubation?a) Readings taken at earlier time points may be different from readings taken at 48 hours b) Bacteria need 48 hours to process all the oxygen in the media c) Bacteria grow slowly in the MR/VP media d) K2HPO4 needs 48 hours to react with the acids produced by fermenting bacteriaAnswer the question briefly and concisely. The Mannitol salt agar (MSA) only allows the growth of halophiles (salt-loving microbes);nonhalophiles will not grow. Among the halophiles, mannitol fermenters will produce acid that turnsthe pH indicator yellow; mannitol nonfermenters leave the medium red. Onto MSA you inoculate ahalophilic mannitol fermenter and a halophilic mannitol nonfermenter. In this case, the medium isacting as (a) __________ medium(s).A. SelectiveB. DifferentialC. Selective and differentialD. EnrichedWhich of the following is TRUE about the Nitrate Reduction test? Question 1 options: A Nitrate oxidase is the enzyme present for a positive test result B Pseudomonas aerugenosa can use oxygen instead of NO2 for aerobic respiration C Ammonia is reduced to NO2 by some bacteria D Oxygen is needed to reduce nitrate E It tests the ability to reduce NO3 to NO2 or ammonia or nitrogen
- The majority of heterotrophic bacteria are (a) free-living chemoheterotrophs (b)photoautotrophs (c) chemo-autotrophs (d) facultative anaerobes (e) obligate anaerobes.Discuss the THREE (3) main stages crucial to microbial leaching of copper from a low-grade ore, indicating the reactions where necessary. In your answer, state ONE (1)example of a bacterium useful to this process.Oxygen is always beneficial to micro-organisms. Discuss this statement in the context of factors that influence microbial growth.