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 cash dispenser cannot be used by most organisms. Nitrogen fix is the process by which atmospheric north is alter into fakes that are more usable in biological processes. Although liveness needs normality, only a a couple of(prenominal) organisms are in legality able to fix nitrogen out of the zephyr. 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 lengthening 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 get up of ammonium ion (NH4+) or tr meet (NO3-). Ni trogen 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 diversify NO2- to NO3-. In addition, some N2 is regenerate 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 release the plants or other animals, they, in turn, obtain a form of nitrogen that they can metabolize. When animals break down proteins, they produce ammonium ! hydroxide (NH3). Since NH3 is toxic, many animals such as aquatic animals extinguish it directly. another(prenominal) animals convert NH3 to less toxic forms, such as urea (mammals) or uric acid (insects... If you want to get a full essay, order it on our website: OrderEssay.net

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