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

Chemical composition of chromatin, CHEMICA L COMPOSITION OF CHROMATIN ...

CHEMICA L COMPOSITION OF CHROMATIN Chromatin threads composed of DNA (31 %), RNA (2-5%) and proteins (Histon-36%, Non histon 28%). Histone and protamines are basic prote

Male reproductive system - semen, SEMEN - Sperms and secretion of acces...

SEMEN - Sperms and secretion of accesory glands collectively known as seminal fluid or semen. It is milky, semi-solid in nature having particular smell. pH : 7.35 - 7.5. Spe

Woodland stage - hydrarch, Woodland Stage - Hydrarch When the lowland ...

Woodland Stage - Hydrarch When the lowland has been built up to an extent where the soil is saturated perhaps only in spring and early summer, certain species of shrubs and tr

Biochemical methods of detecting tumors, Based on your knowledge of neoplas...

Based on your knowledge of neoplasia, discuss biochemical methods of detecting tumors, and imaging characteristics (in your particular imaging modality) that suggest malignancy. Ex

Theory of embryology - germ plasm theory, GER M PLASM THEORY - It w...

GER M PLASM THEORY - It was proposed by Weismann. According to it, two types of cells are formed during embryonic development viz - Germ cell & Somatic cell. The germ ce

Human body, what are the importance in studying animal tissues?

what are the importance in studying animal tissues?

Determine the procedure of armamentarium, Determine the Procedure of Armame...

Determine the Procedure of Armamentarium 1. Make an impression of the mandibular ridge and pour the cast in type 3 gypsum 2. Apply separating medium and allow it to dry 3

Explain the postoperative nutritional care, Explain the Postoperative Nutri...

Explain the Postoperative Nutritional Care? The therapeutic goal for the post-operative patient is rapid recovery to normal function and well being, minimum complications and e

Determine the width of attached gingiva at implant site, Width of Attached ...

Width of Attached Gingiva at Implant Site The zone of attached gingiva needs to be intact and of adequate width to protect (by separating) the tissue around the implant. If it

Thalassemia, Thalassemia   Thalassemias are the commonest hemolytic ana...

Thalassemia   Thalassemias are the commonest hemolytic anaemias or disorder seen in children in India. This is characterised by deficiency  in the synthesis  of one of the norm

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