The Nitrogen Cycle

atomic number 7 is an essential component of amino acids and nucleic acids, which atomic number 18 the building blocks of either living things. Nitrogen makes up most of the asynchronous transfer mode, but the N2 in the melodic phrase cannot be used by most organisms. Nitrogen regress is the process by which atmospheric north is alter into fakes that are more usable in biological processes. Although liveness inescapably newton, only a some organisms are in faithfulness able to fix nitrogen out of the asynchronous transfer mode. The biochemical reactions of the few types of bacteria that contribute to the recycling of nitrogen may be discussed. All other life is dependent on these organisms for the sequel of the essential nitrogen cycle. Human activity which has an impact on the cycling of nitrogen may also be discussed. Although the atmosphere consists of 80% nitrogen gas (N2), plants can utilize nitrogen only in the practice of ammonium (NH4+) or tr forge (NO3- ). Nitrogen fixation, the conversion of N2 to NH4+, occurs by nitrogen-fixing bacteria that live in the soil, or in the root nodules of certain plants such as legumes. In turn, nitrification occurs by certain nitrifying bacteria that transpose NH4+ to NO2- (nitrite) and by other nitrifying bacteria that switch over NO2- to NO3-. In addition, some N2 is reborn to NO3- by the action of lightning.

On the other hand, denitrification occurs when denitrifying bacteria convert NO3- back to N2. From the NH4+ or NO3- absorbed plants make amino acids and nucleic acids. When animals extinguish the plants or other animals, they, in turn, obtain a form of nitrogen th! at they can metabolize. When animals break down proteins, they produce ammonium hydroxide (NH3). Since NH3 is toxic, many animals such as aquatic animals reject it directly. another(prenominal) animals convert NH3 to less toxic forms, such as carbamide (mammals) or uric acid (insects... If you want to get a full essay, order it on our website: OrderCustomPaper.com

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