- Place the following steps of the light reaction in the correct order: A. A primary electron acceptor grabs the excited electrons from the first photosystem and transfers them to the first electron transport chain. B. To replace the excited electrons, electrons from the first electron transport chain are used. C. An electron in chlorophyll in the first photosystem is excited when hit by a light photon. D. Electrons travel down the second electron transport chain. E. Electrons are passed to NADP + to create NADPH (an electron carrier) F. As electrons travel through the electron transport chain, they release energy which is used to make ATP from ADP (via a proton pump \& ATP synthase). G. To replace the excited electrons, water molecules are split, creating O 2 and H + ions as byproducts. H. An electron in chlorophyll in the second photosystem is excited when hit by a light photon. 1. A primary electron acceptor grabs the excited electrons from the second photosystem and transfers them to the second electron transport chain. .