UrbanPro
true

Take Class 10 Tuition from the Best Tutors

  • Affordable fees
  • 1-1 or Group class
  • Flexible Timings
  • Verified Tutors

Oxidative Phosphorylation

Bhakti M.
17/02/2017 0 0

Oxidative Phosphorylation
It is the main source of energy of our cell. Takes place in Mitochondria. Movement of protons through inner mitochondrial membrane leads to ATP production.

Definition:
Oxidative phosphorylation includes the coupling of the oxidation of NADH or FADH2 by the respiratory chain with the synthesis of ATP via gradient of protons across the inner mitochondrial membrane.

 

Electron Transport Chain:
An electron transport chain consists of a properly arranged & oriented set of electron carriers transporting electrons in a specific sequence from a reduced nicotinamide coenzyme (NADH) or a reduced flavin prosthetic group (FADH2) to molecular O2.

 

The inner mitochondrial membrane carries an electron transport chain called the mitochondrial respiratory chain, which forms the final path for electron flow from tissue substrates to molecular O2.

At each step, electrons flow from the reluctant of a redox couple, having a lower redox potential to the oxidant of another redox couple possessing a higher redox potential. The free energy, liberated during the transmitting of electrons along the chain, is used in forming high-energy bonds of ATP.

Definition:
The sequence of reactions whereby the reduced forms of the coenzymes are reoxidized by molecular O2 known as electron transport chain.

The chain has principle electron carriers

  • NADH dehydrogenase.
  • Succinate dehydrogenase.
  • Coenzyme Q.
  • Cytochromes b2, bH, b560, c1, c, a, & a3 and iron sulphur proteins.

Each of them functions as a redox system with its prosthetic group or metal ions changing alternatively to reductant and oxidant – forms during electron transport.

Steps Of Reactions
To administrate electron transport chain in mitochondria inner membrane four complex presents separately.

  1. Complex I or NADH-CoQ reductase

It transfers reducing equivalents (I.e. H+ and e) from NADH to CoQ through its FMN and iron-sulfur clusters, oxidizing NADH and reducing CoQ.

  1. Complex II or succinate -CoQ reductase

It transports clusters directly to CoQ from succinate through its FAD, cytochrome v560 and iron -sulfur clusters

  1. Complex III or QH2 cytochrome C reductase

  • Complex III transfers electrons from QH2 to cytochrome C.
  • QH2 transfers one of its two electrons to the Fe2S2
  • The second electron is carried successively by cytochrome b2, cytochrome bH and CoQ again.
  • Later less received electron passes directly to cytochrome C1.
  • Cytochrome C1 then donates the electron to cytochrome C
  1. Complex IV or cytochrome C oxidase

  • It transfers one electron from each of four consecutive.
  • Ferrocytochrome C molecules to O2 molecules producing four ferricytochrome C molecules and two water molecules.

0 Dislike
Follow 0

Please Enter a comment

Submit

Other Lessons for You

What Are Oleochemicals?
>> switching from petrochemicals to oleochemicals. >>Oleochemicals are chemical compounds derived from natural fats and oils that can be used as raw materials or as supplemental materials...

Debraj Paul | 04/05/2022

0 1
0


A Brief Outline of the Anglo-Saxon Period in the History of English Literature
The Germanic tribes arrived in Britain around 600 A. D. The three main tribes. - the Angles, the Saxons and the Jutes - occupied different regions in Britain after defeating the inhabitants, the Celts....

Sharada Devi V. | 10/02/2022

0 0
0

Mathematical Economics
Functions of one variable (DEMO) Reference book: Sydsaeter and Hammond Play with Graphs- Arihant Content plan for Day 1: Graphs of Functions: Special focus on trigonometric functions. All basic functions...

Samiksha K. | 27/12/2021

0 0
0

Sandhi (संधि)
सन्धि (सम् + धि) शब्द का अर्थ है 'मेल' या जोड़। दो निकटवर्ती वर्णों के परस्पर मेल से जो विकार (परिवर्तन) होता है वह संधि कहलाता है। संस्कृत, में परस्पर स्वरो या वर्णों के मेल से उत्पन्न विकार को सन्धि...

Arun | 26/07/2021

2 1
0
X

Looking for Class 10 Tuition Classes?

The best tutors for Class 10 Tuition Classes are on UrbanPro

  • Select the best Tutor
  • Book & Attend a Free Demo
  • Pay and start Learning

Take Class 10 Tuition with the Best Tutors

The best Tutors for Class 10 Tuition Classes are on UrbanPro

Book a Free Demo

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more