About oxidative phosphorylation

1. PRESENTED BY-SHEKHAR JYOTI DAS
ROLL NO-230404001
BRANCH- BIOTECHNOLOGY 3RD SEM

2.  Oxidative phosphorylation is the final step in
cellular respiration. It occurs in the
mitochondria. It is linked to a process known
as electron transport chain. The electron
transport system is located in the inner
mitochondrial membrane. The electrons are
transferred from one member of the
transport chain to another through a series of
redox reactions

4. Oxidative phosphyorylation is combination of
electron transport chain and chemiosmosis.
 In electron transport chain the electron get
shuffeled from one complex to another
complex( complex I to IV)
 In chemiosmosis the ATP synthase pumps
the proton gradient to generate ATP.

6. Reduced NADH and FADH2 transfer their electrons to
molecules near the beginning of the transport chain. After
transferring the electrons, they get oxidised to NAD+ and FAD
and are utilised in other steps of cellular respiration.

8. Electron Transport and Proton Pumping
The electrons move from a higher energy level to a
lower energy level, thereby releasing energy. Some
of the energy is used to move the electrons from
the matrix to the intermembrane space. Thus, an
electrochemical gradient is established.
Splitting of Oxygen to form Water
The electrons are then transferred to the oxygen
molecule which splits into half and uptakes H+ to
form water.

10. ATP Synthesis
The H+ ions pass through an enzyme called
ATP synthase while flowing back into the
matrix. This controls the flow of protons to
synthesize ATP.