Please help with these questions Respiration StrategyA Respiratory dehydrogenase
ID: 192022 • Letter: P
Question
Please help with these questions
Respiration StrategyA Respiratory dehydrogenases erabic respiration NOg NO2 NO nitrate reductase l-Ubiquinone 1-3 Cyanide insensitive oxidase nitrite reductase be, complex aa, cytochrome oxidase NO reductase Cytochrome Azurin cytochrome oxidase1 N,O reductase chb cytochrome oxidase 2 N2 Figure 2. For the following questions, use the above figure which illustrates the two respiration strategies that Pseudomonas aeruginosa can use. The solid arrowsrepresent the flow of electrons through the EIC to various terminal electron acceptors. Image© Ara, 2011 7. Under which environmental condition would P. aeruginosa use respiration strategy "A"? 8. Consider the reduction of NOs to NO2 . Which of these two compounds will serve as both a reductant and oxidant in denitrification? 9. When P. aeruginosa uses aerobic respiration (on the right), what is the terminal electron acceptor? 10. How would you describe the oxygen preference of P. aeruginosa based on the possession of both respiration strategies? 11. Is this dissimilative or assimilative nitrate reduction?Explanation / Answer
7.Answer: Under anerobic conditions P.aeruignosa uses the respiration strategy A.
8.Answer: NO-2 acts as both reductant and oxidant in denitrification process.
9.Answer: cbb3 cytochrome oxidase is the terminal electron acceptor in aerobic respiration.
10.Answer: Even in low levels of xygen also P.aeruignosa can convert nitrites to nitrates.
11.Anaswer: This is a dissimilative nitrate reduction process since reduction takes place through series of nitrogen compounds to final N2 gas.