Put the steps of the light reactions in the correct order

1. Photosystem II receives photons in the form of light energy

2. Electrons from the electron transport chain close to photosystem Il replace the electrons lost in photosystem I

3. Light energy is transferred to a chlorophyll reaction center where electrons become energized.

4. Electrons move to an electron acceptor in the electron transport chain and electrons in photosystem II are replaced by the splitting of a water molecule
Electrons move down the electron transport chain, releasing energy

5. Electrons move down the electron transport chain releasing energy

6. Water is split to replace the electrons in photosystem II

7. At the end of the electron transport chain, the energized electrons and an H+ ion are used to reduce NADP+ to NADPH

8. Electrons from Photosystem I become energized and escape photosystem I and move down the second electron transport chain.

9. H+ ions flow down the concentration gradient through a channel in ATP Synthase, releasing energy in the process

10. ATP uses energy to add a phosphate to ADP forming ATP

11. A protein in the electron transport chain, pumps H+ ions from the stroma into the thylakoid space