Molecular hydrogen, Biology

Assignment Help:

Molecular Hydrogen

N2-fixing organisms also produce a membrane bound enzyme called uptake-hydrogenase under N2-fixing condition. The physiological significance of the presence of uptake hydrogenase lies in its ability to consume hydrogen produced during nitrogenase activity through aerobic electron transport chain generating ATP in the process. Such nitrogenase uptake-hydrogenase relationship in nitrogen fixing cells provides the following advantages:

  1. By aerobic respiration it restores a major part of energy in the form of ATP
  2. It offers protection of nitrogenase from oxygen.
  3. It prevents inhibitory effect of H2 on nitrogenase activity.

It has been observed that the nitrogenase enzyme catalyses exclusive production of hydrogen provided the N2-fixer is in an atmosphere devoid of nitrogen. Efforts are being made to exploit this special property of the enzyme for photo production of H2 by heterocysts of cyanobacteria on a commercial scale. This would require construction of special strains of cyanobacteria that would be genetically deficient in uptake hydrogenase enzyme. It. is expected that these strains would continuously generate hydrogen in photosynthetic and N2-fixing condition.


Related Discussions:- Molecular hydrogen

How is the smoothing tendency of cornea functioned, How is the smoothing te...

How is the smoothing tendency of cornea functioned? Smoothing tendency: In health and in disease condition the epitheliurm has a strong tendency to smoothen the underlyin

Sunlight - aquatic habitats, Sunlight - Aquatic Habitats Sunlight is a...

Sunlight - Aquatic Habitats Sunlight is a major limiting factor for water bodies, since light rapidly diminishes as it passes down the column of water. The upper layers of the

How does the excretory system of nematodes work, How does the excretory sys...

How does the excretory system of nematodes work? The metabolic residuals of nematodes are collected by two longitudinal lateral excretory channels that open in one excretory po

Principles of cardiopulmonary bypass mechanism (cpb), PRINCIPLES OF CARDIOP...

PRINCIPLES OF CARDIOPULMONARY BYPASS MECHANISM (CPB) What is CPB? It is a technique by which the mechanical function of the heart and respiratory function of the lungs

Eutrophication - effect on water bodies, Eutrophication - Effect on Water B...

Eutrophication - Effect on Water Bodies Moderate quantities of sewage decay naturally in a water body and water gets purified after some time. But the problem arises when the

What are the types of leukocytes, What are the types of leukocytes and how ...

What are the types of leukocytes and how are they classified into granulocytes and agranulocytes? The types of leukocytes are monocytes, lymphocytes, neutrophils, eosinophils

Heart in amphibians, Amphibia n - 3 chambered heart 2 auricles and ...

Amphibia n - 3 chambered heart 2 auricles and 1 ventricle. Sinus venosus and truncus arteriosus (its main part is pylengium) present. Incomplete double circulation prese

Organisational behaviour of health care, Organisational Behaviour of Health...

Organisational Behaviour of Health Care The insights provided by the theories of organisational behaviour emphasise the need for the establishment of institutional frameworks

Major events during gastrulation, MAJOR EVENTS DURING GASTRULATION - 1....

MAJOR EVENTS DURING GASTRULATION - 1.       There is rearrangement of cells due to morphogenetic movement of the cells of blastoderm. 2.       The three primary germ layer g

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