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

Describe valvar aortic stenosis murmurs, Describe Valvar Aortic Stenosis Mu...

Describe Valvar Aortic Stenosis Murmurs ? Characteristic: Harsh, rasping crescendo-decrescendo murmur best heard anywhere in a straight line from right 2nd ICS to apex ("sash"

Vascular lesions caused by leeches upon the blood vessels, Q. The vascular ...

Q. The vascular lesions caused by leeches upon the blood vessels of their host cause blood naturally to coagulate. How does the leech solve this problem since it could be expected

Benefits of high-throughput expression , What are the benefits of high-thro...

What are the benefits of high-throughput expression analysis in molecular biological investigations? Ans) These methods permits simultaneous analysis of the expression of a lot

What are immunoglobulins, What are immunoglobulins? Immunoglobulin is t...

What are immunoglobulins? Immunoglobulin is the exchange name given to antibody. Immunoglobulins are complex proteins having an invariable portion and a variable portion and ma

Flame cells, where are flame cells present?

where are flame cells present?

The human foetus expelled from the uterus of its mother, How is the human f...

How is the human foetus expelled from the uterus of its mother: The total time required for the embryonic and foetal development is called gestation period which is usually

Diplotene and diakinesis, Diplotene: The paired chromosomes repel eac...

Diplotene: The paired chromosomes repel each other and begin to separate. Separation however, is not completed, because homologous chromosomes remain united by their point

What is the treatment process of mitral stenosis, Q. What is the treatment ...

Q. What is the treatment process of mitral stenosis? Presence of symptoms or any complications is an indication for treatment. Apart from penicillin prophylaxis no other treatm

Poultry and duck diseases-fowl pox, Fowl pox Fowl-pox is a highly infec...

Fowl pox Fowl-pox is a highly infectious disease of poultry, especially chickens and turkeys. Pheasants, ducks, geese and guineafowls also suffer from an infection similar to f

Types of protein fibers of the connective tissue proper, Q. What are the th...

Q. What are the three kinds of protein fibers of the connective tissue proper? The matrix of the connective tissue proper is made of elastic fibers, collagen fibers and reticul

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