Question

Differentiate between photophosphorylation and oxidative phosphorylation.

Answer 1

• Photophosphorylation takes place in chloroplast during light reaction whereas oxidative phosphorylation takes place in mitochondria during respiration.
  
• All green cells on illumination accomplish photophosphorylation whereas all living cells perform oxidative phosphorylation.
  
• In photophosphorylation, energy stored in ATP is obtained by sun, whereas in oxidative phosphorylation, energy stored in ATP is obtained by oxidation of organic compounds.
  
• Splitting of water occurs in photophosphorylation whereas synthesis of metabolic water occurs in this process.
  
• Photophosphorylation produces reduced coenzymes, whereas oxidative phosphorylation oxidises reduced coenzymes.