Notes in MGY377 Lec 8

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Published	09/30/2023	What is nitrogen fixation?
Published	09/30/2023	What is a challenge associated with nitrogen fixation?
Published	09/30/2023	Describe the biological nitrogen fixation pathway/equation.
Published	09/30/2023	What 2 protein components comprise the nitrogenase complex?
Published	09/30/2023	Nitrogenase is incredibly sensitive to oxygen. Why is this?
Published	09/30/2023	How is nitrogenase's sensitivity to oxygen overcome by some symbiotic relationships?
Published	09/30/2023	Nitrogenase is {{c1::slow::fast/slow}} - {{c1::12}} electron pairs per second (i.e. only 3 molecules of N2 per second)
Published	09/30/2023	{{c1::4}} ATP are required per pair of electrons transferred in nitrogenase complex. Reduction of N2 -> 2NH3 + H2 requires 4 pairs of electrons so …
Published	09/30/2023	Describe how the nitrogenase complex works.
Published	09/30/2023	How does rhizobia (symbiotic nitrogen fixing bacteria) establish itself and grow in plants? (6 steps)
Published	09/30/2023	What are categories are non-symbiotic nitrogen fixing bacteria?
Published	09/30/2023	Compare the estimates of N2 fixation rates of 1. symbiotic, 2. associated, and 3. free-living bacteria
Published	09/30/2023	Name the 2 ammonium assimilation pathways?
Published	09/30/2023	Describe the assimilation pathway when N is not limiting
Published	09/30/2023	Describe the assimilation pathway when N is limiting
Published	09/30/2023	Aside from nitrogen fixation, bacteria are also major drivers in {{c1::sulfur}} cycling in the environment.
Published	09/30/2023	How does glycolysis produce energy (ATP and NADH)?
Published	09/30/2023	Glycolysis breaksdown 1 glucose molecule to {{c1::2}} pyruvate
Published	09/30/2023	Glycolysis is also referred to as {{c1::Embden-Meyerhof}} pathway
Published	10/07/2023	Glycolysis occurs in {{c1::both presence and absence::presence or absence?}} of O2
Published	09/30/2023	What happens to pyruvate produced during glycolysis?
Published	09/30/2023	What are some common fermentation products?
Published	09/30/2023	NAD+ is generated by oxidation of NADH by enzymes that reduce {{c2::pyruvate}} to a variety of fermentation products and shuttled back to {{c1::glycer…
Published	09/30/2023	What did Chaim Weizmann discover?
Published	09/30/2023	Where does H2 come from in rocks?
Published	09/30/2023	Sulfate most likely originates from oxidation of sulfide minerals (action of dissolved oxidants) derived from {{c1::radiolysis of water }}
Published	09/30/2023	What is the metabolic reaction used by a single species of bacteria found in water 2.8 km deep in Archaean metabasalt microbial biome? (No photosynthe…
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