Everything you need to know about biogeochemical cycling. Some of the most frequently asked exam questions are as follows:- Q.1. What is carbon cycle? Ans: It mainly includes the transfer of CO2 and organic carbon between the atmosphere (the source of inorganic CO2) and hydrosphere (the aqueous envelope of the earth as bodies of water and aqueous vapours) and lithosphere [...]
In this article we will discuss about the enzyme system involved in the fixation of atmospheric nitrogen. The fixation of atmospheric nitrogen relies on nitrogenase enzyme system, which comprise of nitrogenase and nitrogenase reductase. The electrons are transferred through ferredoxin or flavodoxin to nitrogenase reductase and then to nitrogenase where they are utilized to reduce N2 and H+ to NH3 [...]
In this article we will discuss about the biogeochemical cycling of carbon, nitrogen, phosphorus and sulfur. 1. The Carbon Cycle: In nature carbon exists in the form of inorganic and complex organic compounds. In atmosphere the concentration of CO2 is only 0.32% which is less than what is required by plants for photosynthesis. The CO2 is the main source of [...]