Nitrogen Fixation - Nitrogen Fixation PLB 301, Section 2,...

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Nitrogen Fixation PLB 301, Section 2, Sam Rossman, November 28, 2007 Introduction Although earth’s atmosphere is composed of roughly seventy five percent nitrogen most organisms are not capable of fixing atmospheric nitrogen into nitrogen containing compounds that are needed by all living organisms. Luckily there are specialized microrganisms that are capable of fixing nitrogen. Generally this is done in symbiotic relationships between plants and nitrogen fixing bacteria. One such symbiotic relationship is found between Rhizobium and alfalfa. Alfalfa naturally develops nodules, which are clusters of bacteria that are producing nitrogen compounds for the plant. Rhizobium bacteria naturally occur in most soils. In the nitrogen fixation reaction atmospheric nitrogen (N 2 ), six protons and six electrons are combined to form two ammonia (NH 3 ). Also is this reaction many ATP are used, which results in many ADP and inorganic phosphorus.
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Nitrogen Fixation - Nitrogen Fixation PLB 301, Section 2,...

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