Biological fixation - nitrogen fixation, Biology

Assignment Help:

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.


Related Discussions:- Biological fixation - nitrogen fixation

Signify the term - pectoral girdle., Signify the term - Pectoral girdle. ...

Signify the term - Pectoral girdle. Bones in vertebrates that connect the appendages on the left and right side of the anterior appendicular skeleton to each other. Pectoral gi

Symmetry, what is the differences between spherical symmetry and radial sym...

what is the differences between spherical symmetry and radial symmetry

Cell surface receptors, Hydrophilic and some lipophilic hormones bind to ce...

Hydrophilic and some lipophilic hormones bind to cell surface receptors. These are necessary  membrane  proteins  located  in the plasma  membrane  which  bind  the  signaling  mol

Muscles of the legs contribute to the venous return, Q. How do the muscles ...

Q. How do the muscles of the legs and of the feet contribute to the venous return? The muscles of the legs mainly the muscles of the calves compress and contract the deep veins

What is the function of the plant cell wall, Ans) The plant cell wall has s...

Ans) The plant cell wall has structural and protective functions. It plays significant role in the constraint of the cell size, preventing the cell to break when it absorbs much wa

Stds, define stds give 5 examples of stds give signs, symptoms, treatment a...

define stds give 5 examples of stds give signs, symptoms, treatment and prevention of each example

Under which forms is the trypanosoma cruzi found, Under which forms is the ...

Under which forms is the Trypanosoma cruzi found in its hosts? In the definitive hosts as well as in triatomine bugs (middle hosts) the protozoan that causes Chagas' disease ch

Total arterial re-vascnlarisation, Total Arterial Re-vascnlarisation :  In...

Total Arterial Re-vascnlarisation :  In total arterial re-vascularisalion (TAR) end of the right internal mammary artery (RIMA) or radial arlery (RA) is anastomosed to the side of

Define some precautions for estimation of amount of bacteria, Define some P...

Define some Precautions for Estimation of the Amount of Bacteria? 1. Dilution should be made carefully. 2. Use fresh sterile pipette for making each dilution. 3. Aseptic

Functions of stomata, Functions of Stomata The cuticle forms outermost...

Functions of Stomata The cuticle forms outermost surface of the leaf and offers resistance to the evaporation of water vapour and entry of carbon dioxide necessary for photosy

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd