Biological fixation - nitrogen fixation, Biology

Biological fixation - Nitrogen Fixation

Approximately 63% of all nitrogen fixed is through biological fixation. Nitrogen fixing organisms are primarily prokaryotes; bacteria and blue green algae. Nitrogen fixation requires activation of molecular nitrogen by splitting nitrogen into two atoms of free nitrogen N2 → 2N.

This is an energy requiring step, which in biological fixation requires 160 kcal/mole. The actual fixation step, in which two atoms of nitrogen combine with three molecules of H2 to form two molecules of ammonia (NH3) releases 13 kcal/mole. Therefore, the net energy requirement for nitrogen fixation is 147 kcal/mole.

Posted Date: 1/19/2013 2:11:39 AM | Location : United States







Related Discussions:- Biological fixation - nitrogen fixation, Assignment Help, Ask Question on Biological fixation - nitrogen fixation, Get Answer, Expert's Help, Biological fixation - nitrogen fixation Discussions

Write discussion on Biological fixation - nitrogen fixation
Your posts are moderated
Related Questions
Classification of Minerals Minerals can be separated into two main categories, namely, main elements (calcium, potassium, phosphorous, chlorine, sodium, magnesium) and trace el

Explain the Basal Metabolic Rate? The Basal Metabolic Rate (BMR) gradually decreases after the attainment of maturity due to a decrease in muscle mass tissues and physical acti

Ask question #i need the complete table having the names of the diseases their causative agents and their control,caused by air-borne pathogens?

Q. Pre-operative Planning and Implant Exposure? A hollow acrylic transitional restoration should be fabricated based on the original diagnostic preview with respect to the toot

Carbomedics Valve :  Almost similar to StJude Medical valve, his is a low profile bileaflet valve made of pyrolitic carbon. On echo cardiography four small jets of regurg

Which of the following is an effect of the following drugs? A. Drug A is an agonist of the Vasopressin2 Receptor (V2R).  High levels of Drug A in the extracellular spaces surro

What are the secondary roots? In origin how the secondary roots differentiate from shoots? The Secondary roots are ramifications of the primary (major) root. The secondary root

Explain the term Mutations? Mutations are changes in the genetic structure of an organism that occur at random or are the results of environmental causes. The majority of new m

Describe the Dinosaurs in multimedia Tutorials? Travel back to a time when dinosaurs ruled the earth. Learn about the different types of dinosaurs and practice building your ow

What are cytochromes? Cytochromes are proteins of the internal mitochondrial membrane that are specialized in electron transfer and participate in the respiratory chain. Energi