Question

difference in oxidative phosphorylation and photophosphorylation

Answer 1

Photophosphorylation occurs during photosynthesisand oxidative phosphorylation during cellular respiration.

Explanation:

Both photophosphorylation and oxidative phosphorylation (oxphos) are processes cells use to make energy in the form of ATP.

First the similarities:

in both cases electrons are transferred through a series of membrane proteins

the electrons provide energy to pump protons (H+) to one side of the membrane

the protons flow back through a special enzyme (ATP-synthase) which makes ATP

Then the differences:

when it occurs:
oxphos occurs during cellular respiration ↔
photophosphorylation occurs during photosynthesis

where it occurs: oxphos occurs inside mitochondria ↔ photophosphorylation occurs inside thylakoids (in chloroplasts)

energy source: the energy source for oxphos is glucose ↔
the energy source for photophosphorylation sunlight.

electron acceptor: in oxphos the final electron acceptor is molecular oxygen ↔
in photophosphorylation the final electron acceptor is NADP+