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 about aorto pulmonary window, Describe about Aorto Pulmonary Windo...

Describe about Aorto Pulmonary Window ? This uncommon malformation consists of communication usually non-restrictive between the adjacent walls of the ascending aorta and pulmo

What chemical is used to test for the presence of co2, What chemical is no...

What chemical is normally used to test for the presence of carbon dioxide? What is the result of the test if carbon dioxide is present?   a) Lime water is used t

Mention chemical agents available for sterilization, Q. Mention chemical ag...

Q. Mention chemical agents available for sterilization? Various chemical agents available for sterilization are: Alcohols: ethyl alcohol, isopropyl alcohol, trichlorobuta

#virus, how do viruses reproduce

how do viruses reproduce

How does the inflammation mechanism work, How does the inflammation mechani...

How does the inflammation mechanism work? When some tissue injury happens histamine and other vasoactive substances (known as mediators of inflammation) are released, they caus

Raw material for industry - impacts on biodiversity, Raw Material for Indus...

Raw Material for Industry - impacts on biodiversity The industry, producing goods and services, relies and impacts on biodiversity directly. Much of the raw material that goes

Explain the adverse effects of menactra, Adverse effects of menactra The...

Adverse effects of menactra The most common adverse reactions to Menactra include headache, fatigue and malaise, in addition to pain, redness and induration at the site of injec

Digestion of food materials, DIGESTION OF FOOD MATERIALS Digestion, you...

DIGESTION OF FOOD MATERIALS Digestion, you know, involves  the mixing of  food, its movement through the digestive tract and chemical breakdown of the large ntolecules of  food

Induction in metamorphosis, Induction in Metamorphosis Some of the mo...

Induction in Metamorphosis Some of the morphogenetic changes throughout metamorphosis are found fo be quite independent of hormone action. For instance, generally during meta

What is sanning membrane proteins, Which of the following is true for the f...

Which of the following is true for the following spanning membrane proteins? A. The mAChR (muscarinic Acetylcholine Receptor) is a spanning membrane protein located in the memb

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