Catabolic Energy Generating Mechanisnm of an unknown bacteria. You know your org

Question

Catabolic Energy Generating Mechanisnm of an unknown bacteria. You know your organism is 1a. You are monitoring the growth of two different flasks facultative anaerobic chemoheteratroph, which can obtain energy through aerobic respiration, anaerobic respiration tion. The two flasks both contain 2% glucose and amino icds but na nitrate. One is grown, the other was not. You examine the cell growth and the levels of glucose in each flask, however you well aerated and hich data went with each lask. Look at the two graphs below and predict which represents the aerated and unaerated flask, explain your cholce based on both the levels of cells and the levels of glucose 90000000 0.5 10000000 o Lo 5 10 15 20 25 S 10 15 202 1b. What do you think would happen to the levels of cells and glucose in th e unaerated flask if nitrate were added? now about redox potential, calculate the E for each of the following electron transfers. Based on 2. Using what you k the E, which would produce the most ATP if used as the donor/acceptor pair of an electron transport chain. H2 donor 02 acceptor Fe® donor NAD. acceptor FADH2 donor NO' acceptor N02 donor 02 acceptor * . ·

Explanation / Answer

It is clear that the 1st graph is representing the aerated flask because the bacteria are facultative anaerobes. They require oxygen too and under unwanted condition, they can live in anaerobic condition. In non-aerated the environment is only anaerobic therefore, here bacteria are getting level of growth after 20 minutes, and due to the anaerobic condition, the glucose cannot utilize when the present oxygen would deplete. That is why the second graph is showing plenty of glucose concentration is remain unused.

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