Respuesta :
You said Photosynthesis then it is Light !!
and if it is oxidation of food the ETS cycle is powered by NADPH !!
and if it is oxidation of food the ETS cycle is powered by NADPH !!
In photosynthesis of plants, the light gives energy to the electrons moving through the electron transport chain. This Light energy is then converted to chemical energy, which produces ATP; an energy storage molecule and NADPH, a reduced electron carrier. Moreover, light energy is used to pump protons across a membrane to produce a proton-motive force.