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10 Cards in this Set

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Nitrogen Cycle

the series of processes by which nitrogen and its compounds are interconverted in the environment and in living organisms, including nitrogen fixation and decomposition.

Phosphorus Cycle

The phosphorus cycle is the biogeochemicalcycle that describes the movement ofphosphorus through the lithosphere, hydrosphere, and biosphere

Nitrogen Fixation

the chemical processes by which atmospheric nitrogen is assimilated into organic compounds, especially by certain microorganisms as part of the nitrogen cycle

Nitrogen Fixing Bacteria

Nitrogen-fixing bacteria, microorganisms capable of transforming atmospheric nitrogen into fixed nitrogen (inorganic compounds usable by plants). More than 90 percent of all nitrogen fixation is effected by these organisms, which thus play an important role in the nitrogen cycle

Legumes

Legumes are grown agriculturally, primarily for their food grain seed (example beans and lentils, or generally pulse), for livestock forage and silage, and as soil-enhancing green manure. Legumes are notable in that most of them have symbiotic nitrogen-fixing bacteria in structures called root nodules.

Nitrogenase

an enzyme of various nitrogen-fixing bacteria that catalyzes the reduction of molecular nitrogen to ammonia

Nitrifying Bacteria

Nitrifying bacteria are chemoautotrophic or chemolithotrophs depending on the genera bacteria that grow by consuming inorganic nitrogen compounds

Denitrifying Bacteria

form a necessary part of the process known asdenitrification as part of the nitrogen cycle, their primary purpose being to metabolise nitrogenous compounds, with the assistance of the nitrate reductase enzyme, to turn oxides back to nitrogen gas or nitrous oxides for energy generation.

Nitrate Reductase

The nitrate reductase test is a test to differentiate between bacteria based on their ability or inability to reduce nitrate (NO3−) to nitrite (NO2−) using anaerobic respiration

Microorganisms

a microscopic organism, especially a bacterium, virus, or fungus