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

Describe the monomer unit of a protein, Describe the monomer unit of a prot...

Describe the monomer unit of a protein and how monomer units are assembled into peptides.

Explain pasteurization - method of food preservation, Explain Pasteurizatio...

Explain Pasteurization (temperature below 100° C) - method of food preservation? Pasteurization is a heat treatment that kills a part but not all the microorganisms present and

Define the ascorbic acid - basic concepts, Define the Ascorbic Acid - Basic...

Define the Ascorbic Acid - Basic Concepts? Ascorbic acid is a water-soluble vitamin, whose structure is shown in Figure. You would have noticed that its structure resembles glu

Explain about the glycemic index (gi), Explain about the Glycemic Index (GI...

Explain about the Glycemic Index (GI)? In the previous sections, we have studied that some carbohydrates are rapidly digested and absorbed, some are digested slowly while some

Explain about fats and oils, Explain about Fats and oils Fats and oils ...

Explain about Fats and oils Fats and oils are a unique class of agricultural products in that a high degree of interchangeability among them is possible for many products and u

What vector force does particle b then exert on a, A charged particle A exe...

A charged particle A exerts a force of 2.39uN to the right on charged particle B when the particles are 12.3 mm apart. Particle B moves straight away from A to make the distance be

What does boiling do to an enzyme, What does boiling do to an enzyme? Enz...

What does boiling do to an enzyme? Enzymes are denatured (their shape is changed so it doesn't work) when boiled.

Explain about the mucor - fungi, Explain about the Mucor  - Fungi? Muc...

Explain about the Mucor  - Fungi? Mucor is present as a food contaminant. It resembles Rhizopus in life history and colonies appear just like Rhizopus. However, important diffe

What is ventricular septal defect, What is Ventricular Septal Defect (VSD) ...

What is Ventricular Septal Defect (VSD) ? VSD accounts for 15-20 per cent of all CHDs. The ventricular septum may be divided into a small membranous portion and a large muscula

What is the importance of vitamin B12, What is the Importance of vitamin B ...

What is the Importance of vitamin B 12 Vitamin B 12 deficiency is manifest by the  symptoms of pernicious anaemia (Addison-Biermer's disease). An irreversible atrophy of the

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