Answer:
The process of ATP synthesis in both chloroplast and mitochondria is similar:
1. Generation of electrochemical gradient across the membrane: The movement of electrons generates a difference in the concentration of protons across the membrane in both organelle. Due to this, an electrochemical gradient is established.
2. Movement of protons or hydrogen ions through ATP synthase: The generation of electrochemical gradient leads to the movement of options across the membrane through embedded ATP synthase enzyme.
Thus, ATP production in both the organelles is similar.