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

Explain cell cycle , The life of a eukaryotic cell can be explained ...

The life of a eukaryotic cell can be explained as a cell cycle. Mitosis and cell division happens in the M phase that lasts for only about 1 h. This is followed by the G1 phase whe

Define the term - microfilaments and microtubules, Define the term - microf...

Define the term - microfilaments and microtubules The cytoskeleton is, in fact, termed as the "bone and muscle" of the eukaryotic cell, and is composed of a network, consisting

Measures to control malaria infection, Measures to control malaria infectio...

Measures to control malaria infection: Malaria is a communicable disease caused by the female anopheles mosquito. a) Controlling mosquito population : Mosquito population can b

Safety and First-Aid Procedures, How can a family prevent injuries from a f...

How can a family prevent injuries from a fire in the home

Explain the failure of endodontic Treatment, Explain the Failure of Endodon...

Explain the Failure of Endodontic Treatment 1. Microorganisms are left inside the canal - Improper/inability of cleaning and shaping, - Source of infection could be: peri

Tuberculosis, Tuberculosis Tuberculosis is caused by a Bacillus-myco...

Tuberculosis Tuberculosis is caused by a Bacillus-mycobacterium tuberculosis, a gram- positive and acid-fast organism. It is communicable disease. Mode of Transmissio

Countercurrent flow, Countercurrent flow is the arrangement by which fish ...

Countercurrent flow is the arrangement by which fish get oxygen from the water which flows by the help of their gills. The water flows across the respiratory surface of the gill i

Electrochemical gradient, Describe forces that contribute to cell''s electr...

Describe forces that contribute to cell''s electrochemical gradient. How does electrochemical gradient influence ion transport?

Define the open loop system, Situation in which a closed loop negative feed...

Situation in which a closed loop negative feedback system is  converted to an open loop system?     A.  A disease that destroys all the adenylyl cyclase and all the cAMP in the

Explain the completed test - most probable number test, Explain the Complet...

Explain the Completed Test - Most Probable Number Test? Coliform colonies on EMB or Endo agar are further examined by completed test by inoculating lactose broth and nutrient a

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