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

Things to do during a cyclone, (a)   For any individual :               ...

(a)   For any individual :                  ·          We should check house, doors and windows and have them repaired whenever necessary.                  ·          We shou

Give detail explanation of aerobic exercises, Aerobic Exercises, Examples a...

Aerobic Exercises, Examples and their Do's and Don'ts In the aerobic exercises it requires activities performed for a longer period here we do like to mention certain activitie

Defination and use of stem cell, Stem cell research has been promoted as a ...

Stem cell research has been promoted as a future medical cure-all for a host of diseases, including Alzheimer's and diabetes, as well as a potential breakthrough for organ replacem

Amoeba, AMOEBA Systematic  Position Amoeba  was discovered by  Rus...

AMOEBA Systematic  Position Amoeba  was discovered by  Russel von Rosenhoff in  1755. He  called it the little proteus  after the mythical  sea god who is believed to be c

Divisions and representing species of the gymnosperms, Q. What are the majo...

Q. What are the major divisions and representing species of the gymnosperms? This group of plants can be separated into conifers (pine, sequoia, cypress), that have flowers cal

Biosynthesis of hemes and chlorophylls, In animals, some of bacteria and fu...

In animals, some of bacteria and fungi, and the first step in tetrapyrrole synthesis is the condensation of the amino acid glycine with succinyl  CoA (an intermediate  of the citri

What are proteins and why they are important for us, What are Proteins and ...

What are Proteins and Why they are important for us? We just read that proteins are essential for maintaining and sustaining life. What are proteins or what constitutes protein

Functions of cholesterol, Cholesterol is a steroid.  It is very significant...

Cholesterol is a steroid.  It is very significant constituentof cell membranes in mammals, it modulates their fluidity. Cholesterol is also the precursor of steroid hormones   such

Nursing process in infective endocarditis, Nursing Process Nursing Ass...

Nursing Process Nursing Assessment Health history-Past-valvular, congenital or syphilitic cardiac disease/cardiac surgery. Habits-IV drug abuse. Assess the signs an

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