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

Obelia, why obelia shows an intermediate grade of organisation

why obelia shows an intermediate grade of organisation

Determine the placental mammalian embryos, Which is the extraembryonic memb...

Which is the extraembryonic membrane whose function is to store nitrogen wastes of the embryo? Is this function present in placental mammalian embryos? The allantois is the ext

What is the root cap, What is the root cap? The root cap is a protectiv...

What is the root cap? The root cap is a protective structure located in the tip of the growing root. It protects the meristematic tissue of the root forming a cap that surround

What are mutagenic agents, What are mutagenic agents? The Mutagenic age...

What are mutagenic agents? The Mutagenic agents, or mutagens, are physical, chemical or biological factors that can cause alteration in DNA molecules. Instances of believed

Common disease of sheep, COMMON DISEASE OF SHEEP - 1 .       ANTHRAX ...

COMMON DISEASE OF SHEEP - 1 .       ANTHRAX - Persons working in wool factories may get infection by breathing. 2 .       BLACK QURTER 3 .       HAEMORRHAGIC S

Digestion, explain digestion in protozoans

explain digestion in protozoans

What is class polychetae - marine worms, What is Class Polychetae - Marine ...

What is Class Polychetae - Marine Worms? The polychaetes differ from the oligochaetes in several ways. The name itself suggests one of the differences. The prefix "poly" means

Biomedical waste management, Waste generated is termed as "Biomedical Waste...

Waste generated is termed as "Biomedical Waste" which means a waste that may contain human pathogens of sufficient virulence and in sufficient concentrations that exposure to it by

Head - structure of the sperm, Head - Structure of the Sperm It exhib...

Head - Structure of the Sperm It exhibits a diversity of shapes in different animal groups, e.g., spherical (teleost fishes), rod or lance shaped (amphibians), spirally twist

Phylum platyhelminyhes, general classification of phylum platy helminthes

general classification of phylum platy helminthes

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