Question

Short / Long Answer Types :
Describe the mechanism of electron transport during oxidative phosphorylation. In which region of the cell is the mechanism located? How many ATP? molecules would be produced when (i) NADH is oxidised, and (ii) succinic acid is oxidised?

Answer 1

• Oxidative phosphorylation is the transfer of energy electrons from one complex to the next and the energy is used to build a hydrogen concentration gradient across the matrix and intermembrane space. The gradient is used to generate ATP by ATP synthase enzyme which is also called as the complex 5.
  
• The mechanism takes place in the inner membrane of mitochondria.
  
• One NADH produces 2.5 or approximately 3 ATP.
  
• One succinate produces 1 FADH${}_2$ which forms 1.5 ATP or approximately 2 ATP.