<Li> Another electron acceptor is less than 10 Å away from the first acceptor, and so the electron is rapidly transferred farther away from the special pair . </Li> <Li> An electron donor is less than 10 Å away from the special pair, and so the positive charge is neutralized by the transfer of another electron </Li> <Li> The electron transfer back from the electron acceptor to the positively charged special pair is especially slow . The rate of an electron transfer reaction increases with its thermodynamic favorability up to a point and then decreases . The back transfer is so favourable that it takes place in the inverted region where electron - transfer rates become slower . </Li> <P> Thus, electron transfer proceeds efficiently from the first electron acceptor to the next, creating an electron transport chain that ends if it has reached NADPH . </P>

The products of the light-dependent reaction are passed to the